LeydenJar Technologies boosts the energy density of li-ion batteries by replacing the traditional graphite anode with a nanoporous, pure silicon anode. This yields cheaper (-20% costs), greener (-85% CO2 footprint) and higher energy density batteries (+70% as compared to state-of-the-art, 1350Wh/L).


Do you want to contribute to a more sustainable world? Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Can you not wait to dive into a VC-backed deep tech scale-up with the ambition to change the world? We are looking for an energetic Research Engineer to join our innovative and ambitious organization. About LeydenJar LeydenJar is a high-tech company, developing pure silicon anodes for a lithium-ion battery that will change the world. We are proud that, here at LeydenJar, we:<ul><li>boost Li-ion battery energy density by 70% by using 10x thinner anodes</li><li>improved cycle life to &gt;450</li><li>achieved fast charging to 60% in under 10 min!</li></ul>We are currently still in an R&amp;D phase, but we are ready to start the actual production of anode foil. LeydenJar Plant One will open in 2026. Your missionLeydenJar Technologies is developing a Li-ion (and solid state) battery solution. As LeydenJar's technologies are unique in the industry - 100% silicon film deposited on Cu substrate with a PECVD deposition method - the success of our story significantly depends on a thorough understanding of our production technology. Also teaming up with our materials and battery specialists is essential to design the best performing products for specific applications so that LeydenJar's technologies can serve the world in as broad a field as possible.As Research Engineer, you will responsible for designing, setting up, and carrying out experiments on our PECVD R&amp;D machines and sharing your findings across the organization. You will work from our production facility in Eindhoven as part of the Plasma Source Development group.  Your skills will complement our growing team of chemical engineers, process engineers, physicists and data scientists during the development of our next generation PECVD equipment. You will be working in a dynamic scale-up environment as part of an international, ambitious and diverse team that is determined to make a better world with cleaner energy. You will gain valuable, on-the-job experience in a scale-up multi-national company, where no day is ever the same. In your role you will:<ul> <li>Design, set up, and carry out experiments on our PECVD R&amp;D machines. </li> <li>Develop and implement new plasma characterization techniques.</li> <li>Analyze sensor readings and iterate on process settings.</li> <li>Assist in data analysis, in coordination with our process engineers and data scientists.</li> <li>Support the development of our next generation PECVD equipment, as well as implementing improvements to our existing equipment.</li></ul>Who are you?<ul><li>For this role we are looking for a proactive and flexible candidate with excellent communication skills and positive attitude.</li><li>You are able to adapt quickly and navigate a changing work environment effectively.</li><li>Background in chemical engineering, materials science, or applied physics (BSc or higher).</li><li>Medior level or higher, 5+ years of relevant experience in process industry laboratory.</li><li>Experience with building experimental setups.</li><li>Hands-on attitude, with affinity for data analysis and presentation.</li><li>Experience with vacuum equipment is a plus.</li><li>You are fluent in English.</li></ul> What can you expect from us? <ul><li>Unique experience in a rapidly scaling VC-backed start-up environment.</li><li>High degree of autonomy and a chance to work on potentially world-changing technology that can be a game changer to a range of industries and a key enabler for the energy transition.</li><li>A total of 10% (on top and based on your monthly gross salary) will be paid by LeydenJar for pension and other insurances).</li><li>You get 25 days of vacation per year (based on 40 hours working week).</li><li>NS Business Card or reimbursement of 0.21 euro per km for commuting.</li><li>Access to OpenUp mental health platform.</li><li>Regular progress talks and support to reach your career goals.</li><li>Great colleagues; at LeydenJar you will be part of a multi-national, ambitious, innovative and entrepreneurial team/20+ different nationalities!/</li><li>Thirsty Thursday – we have drinks every first Thursday of the month.</li><li>We host internal FUN events each year and offer personal development perks.</li><li>We have fresh fruit delivered every Monday in both locations /Leiden and Eindhoven/</li></ul>Do you want to take on the challenge as Research Engineer?We are looking forward to your application! If you'd like to learn more about LeydenJar amazing team, see below: <a href="https://www.rtlnieuws.nl/nieuws/video/video/5357356/5-minuten-je-telefoon-opladen-met-deze-nederlandse-accu-kan-dat-straks"> </a> At LeydenJar we value diversity, and we provide equal opportunities to all applicants without regard to race, color, ethnicity, religion, gender, pregnancy/childbirth, age, national origin, sexual orientation, disability, etc. If there are two or more applicants of equal suitability for a certain position, LeydenJar can under circumstances decide to select applicants based on positive discrimination in full compliance with all relevant and applicable law.

Research Engineer

Do you want to contribute to a more sustainable world? Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Can you not wait to dive into a VC-backed deep tech scale-up with the ambition to change the world? We are looking for an energetic IT System Administrator to join our innovative and ambitious organization.About LeydenJarLeydenJar is a high-tech company, developing pure silicon anodes for a lithium-ion battery that will change the world. We are proud that, here at LeydenJar, we:<ul><li>boost Li-ion battery energy density by 70% by using 10x thinner anodes</li></ul><ul><li>improved cycle life to &gt;450</li></ul><ul><li>achieved fast charging to 60% in under 10 min!</li></ul>We are currently still in an R&amp;D phase, but we are ready to start the actual production of anode foil. LeydenJar Plant One will open in 2026. Your mission As a pivotal member of our team, your mission is to spearhead the management and maintenance of our IT workspace infrastructure, ensuring the seamless operation of our workspace systems. Your role will revolve around providing comprehensive technical support to end-users, troubleshooting and resolving a myriad of technical issues related to hardware, software, and network functionalities.You will be tasked with overseeing the IT service desk software and tools, meticulously managing the IT incident and problems, and rigorously upholding the IT service level agreements (SLAs). Additionally, your responsibilities will extend to proficiently handling IT mobile device management and support, guaranteeing the optimal functioning of our diverse array of end-user devices, including desktops, laptops, and mobile devices.In line with this, you will play a crucial role in managing our IT workspace infrastructure, ensuring the smooth operation of desktops, laptops, and mobile devices. Flexibility to work in both Leiden and Eindhoven locations is a requirement for the role, making mobility a crucial criterion. About the jobThis role entails a wide variety of tasks and responsibilities. Perfect if you are getting your energy from switching between tasks and topics! In short:<ul><li>Provide technical support to end-users, troubleshooting and resolving hardware, software, and network issues with the help of our IT support partners</li><li>Manage the IT service desk software and tools</li><li>Oversee IT incident and problem management processes</li><li>Ensure adherence to IT service level agreements (SLAs)</li><li>Have knowledge of ITIL way of working</li><li>Handle IT mobile device management and support, including device enrolment, configuration, and security</li><li>Manage the IT workspace infrastructure, including desktops, laptops, and mobile devices</li><li>Manage remote access solutions such as virtual desktops and remote access software</li><li>Ensure IT security and compliance for the workspace, including endpoint security and data encryption</li><li>Conduct IT asset management and inventory, tracking and reporting on device usage and inventory</li><li>Develop and maintain the IT service continuity and disaster recovery plan for the workspace</li><li>Monitor and manage the performance of the IT workspace infrastructure</li><li>Create, maintain, and manage knowledge base articles for efficient issue resolution</li><li>Provide end-user training to facilitate seamless access to resources and tools</li><li>Ensure smooth integration and management of software and tools within the workspace.</li><li>Organize and manage Entra ID (Azure Active Directory)</li></ul>About you <ul><li>You are experienced and skilled in It workspace management (at least 4 years of relevant work experience)</li><li>You have at least MBO4 or a higher professional education (HBO) level of thought and work</li><li>You get energy from managing a high variety of tasks and at the same time and know how to prioritize well to ensure you make your deadlines</li><li>You have a strong eye for detail, are discrete and able to work with sensitive data and information</li><li>You are resourceful and have an entrepreneurial mindset</li><li>You like having multiple responsibilities where you balance working together with others with working independently </li><li>Fluency in English, verbally as well as in writing. A Dutch work permit is required.</li></ul> What can you expect from us? <ul><li>Unique experience in a rapidly scaling VC-backed start-up environment</li><li>High degree of autonomy and a chance to work on potentially world-changing technology that can be a game changer to a range of industries and a key enabler for the energy transition</li><li>A total of 10% (on top and based on your monthly gross salary) will be paid by LeydenJar for pension and other insurances)</li><li>You get 25 days of vacation per year (based on 40 hours working week)</li><li>NS Business Card or reimbursement on 0.21 euro per km for commuting</li><li>Access to OpenUp mental health platform</li><li>Regular progress talks and support to reach your career goals</li><li>Great colleagues; at LeydenJar you will be part of a multi-national, ambitious, innovative and entrepreneurial team/20+ different nationalities!/</li><li>Thirsty Thursday – we have drinks every first Thursday of the month</li><li>We host internal FUN events each year and offer personal development perks.</li><li>We have fresh fruit delivered every Monday in both locations /Leiden and Eindhoven</li></ul>Do you want to take on the challenge as IT System Administrator?We are looking forward to your application! If you'd like to learn more about LeydenJar amazing team, see below: <a href="https://www.rtlnieuws.nl/nieuws/video/video/5357356/5-minuten-je-telefoon-opladen-met-deze-nederlandse-accu-kan-dat-straks"> </a> At LeydenJar we value diversity, and we provide equal opportunities to all applicants without regard to race, color, ethnicity, religion, gender, pregnancy/childbirth, age, national origin, sexual orientation, disability, etc. If there are two or more applicants of equal suitability for a certain position, LeydenJar can under circumstances decide to select applicants based on positive discrimination in full compliance with all relevant and applicable law.

IT System Administrator Workspace support

Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Are you a problem-solver, driven to find novel solutions and you have a passion for high-tech machines? Do you embrace challenges and are you a skilled organizer? Are you flexible and determined to get the best out of yourself?Then hurry up and join our multi-national team of ambitious, innovative and entrepreneurial colleagues! LeydenJar Technologies is scaling rapidly and while doing so we are looking for a System Engineer - Vacuum Equipment to join us in our mission to boost battery technology; preferable start date 1st January 2024. About the job LeydenJar Technologies is developing a Li-ion (and solid state) battery solution. As LeydenJar's technologies are unique in the industry - 100% silicon film deposited on Cu substrate with PECVD deposition method - the success of our story significantly depends on thorough understanding of material properties of LeydenJar's silicon Anode. Also teaming up with our PECVD and battery specialists, is essential to design the best performing products for specific applications so that LeydenJar's technologies can serve the world in as broad fields as possible. As a System Engineer - Vacuum Equipment, you will be a central point of vacuum expertise in a context of development of an innovative plasma enhanced chemical vapor deposition (PECVD) equipment. You will work as a part of our equipment design team and will closely interact with system architect, system engineers, software engineers, scientists, mechanical designers, production staff, but also engineering partners. You will be working in a dynamic scale-up environment as part of an international, ambitious and diverse team that is determined to make a better world with cleaner energy. You will be based at LeydenJar’s office in Eindhoven. You will be responsible for:<ul> <li>Development of a novel PECVD equipment as a system engineer, bringing vacuum expertise into the development team;</li> <li>System and concept design of vacuum related sub-system of the equipment;</li> <li>Working with System Architect, translating stakeholder's wishes into design specifications and requirements, helping him managing sub-system interactions</li> <li>Guiding vacuum design related work of external engineering companies</li> <li>Keeping all necessary documentation in place and up to date;</li> <li>Supporting improvements and upgrades of existing equipment from the vacuum point of view. </li></ul>Furthermore, you will assist with: <ul> <li>Ensuring high quality of engineering and design work;</li> <li>Reviewing and challenging system design in relation to vacuum competence.</li> <li>Spreading your expertise amongst your colleagues.</li></ul>About you:<ul> <li>Master or bachelor's degree in mechanical engineering, mechatronics, process engineering or similar</li> <li>5+ years of working experience designing, testing and working with vacuum systems, preferably PECVD systems;</li> <li>10+ years of experience in high-tech equipment development;</li> <li>Experience managing suppliers and engineering partners is a must</li> <li>Proficiency in a 3D CAD is preferred;</li> <li>Innovative mindset, analytical skills and solution oriented;</li> <li>Reputation of somebody who can make things happen.</li></ul>Furthermore, you are:<ul> <li>Punctual, quality focused, self-propelling and decisive;</li> <li>Not easy overwhelmed by complexity and able to navigate through design risks and uncertainties;</li> <li>An efficient communicator in English, and preferably in Dutch;</li> <li>You understand that working in a scale-up means working in an environment where many things happen and where plans change;</li> <li>You have a high level of integrity and ethics;</li> <li>You find it easy to listen and talk to people and bring a smile to work.</li></ul>What can you expect from us?<ul><li>Unique experience in a rapidly scaling VC-backed start-up environment</li><li>High degree of autonomy and a chance to work on potentially world-changing technology that can be a game changer to a range of industries and a key enabler for the energy transition</li><li>A total of 10% (on top and based on your monthly gross salary) will be paid by LeydenJar for pension and other insurances)</li><li>You get 25 days of vacation per year (based on 40 hours working week)</li><li>NS Business Card or reimbursement of 0.21 euro per km for commuting</li><li>Access to OpenUp mental health platform</li><li>Regular progress talks and support to reach your career goals</li><li>Great colleagues; at LeydenJar you will be part of a multi-national, ambitious, innovative and entrepreneurial team/20+ different nationalities!/</li><li>Thirsty Thursday – we have drinks every first Thursday of the month</li><li>We host internal FUN events each year and offer personal development perks.</li><li>We have fresh fruit delivered every Monday in both locations /Leiden and Eindhoven/</li></ul>Do you want to take on the challenge as System Engineer?We are looking forward to your application! If you'd like to learn more about LeydenJar amazing team, see below: <a href="https://www.rtlnieuws.nl/nieuws/video/video/5357356/5-minuten-je-telefoon-opladen-met-deze-nederlandse-accu-kan-dat-straks"> </a> At LeydenJar we value diversity, and we provide equal opportunities to all applicants without regard to race, color, ethnicity, religion, gender, pregnancy/childbirth, age, national origin, sexual orientation, disability, etc. If there are two or more applicants of equal suitability for a certain position, LeydenJar can under circumstances decide to select applicants based on positive discrimination in full compliance with all relevant and applicable law.

System Engineer - Vacuum Equipment

Do you want to contribute to a more sustainable world? Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Can you not wait to dive into a VC-backed deep tech scale-up with the ambition to change the world? We are looking for an energetic Data Scientist to join our innovative and ambitious organization. About LeydenJar LeydenJar is a high-tech company, developing pure silicon anodes for a lithium-ion battery that will change the world. We are proud that, here at LeydenJar, we:<ul><li>boost Li-ion battery energy density by 70% by using 10x thinner anodes</li><li>improved cycle life to &gt;450</li><li>achieved fast charging to 60% in under 10 min!</li></ul>We are currently still in an R&amp;D phase, but we are ready to start the actual production of anode foil. LeydenJar Plant One will open in 2026. Your mission LeydenJar has the goal to develop machine learning driven manufacturing and R&amp;D capabilities. As a key driver of this goal, you will analyze and build models of industrial production data and share your insights across the organization. One of your key achievements will be to identify meaningful signals from sensors on our production machines and connect them to machine behavior and product outcome. Beyond correlational analysis, you will contribute to inverse design models for AI-driven production recommendations to help launch LeydenJar's product to new heights. You will work from our production facility in Eindhoven and report to the Senior Data Scientist as part of the Silicon R&amp;D department. Your skills will complement the growing group of data professionals at LeydenJar which include data system architect and IT application engineer roles. About the jobThe foundations of data collection and usage have been set at LeydenJar with key datasets stored in Azure, data reports in PowerBI, and foundational models and exploratory analysis developed in Python. However, there are still many unexplored areas in which you will play a key role. Your responsibilities will include: <ul><li>Researching, building, and deploying machine learning models to enable data-driven control of the production process to optimize product quality and yield. Your models will also enable AI-driven recommendations for new process parameters or material properties through the use of techniques such as Genetic Algorithms or Bayesian Optimization. Model inputs will include material characterization measurements, production outcomes, and machine sensor timeseries.</li><li>Serving as the go-to data scientist in the production facility, ready to support your colleagues on their analysis goals and questions. As such you will need to understand and track data sources and assist on adhoc data exploration requests.</li><li>Collaborating with the IT and Industrialization Teams to define data system requirements and architecture for data sources and pipelines. </li><li>Learning from field experts in plasma and production to translate scientific understanding into machine learning model improvements. </li></ul>About you <ul><li>You have an MSc or higher in a technology-related field, with a preference for data-focused degrees. A BSc with 3+ years of machine learning experience will also be considered. We have a preference for candidates who have previously worked in a data analyst or data scientist role analyzing real-world data in a professional setting. </li><li>You can code in Python and SQL. In Python you have experience with data analysis libraries such as pandas, matplotlib, scikit-learn, tensorflow, scipy, or statsmodels.</li><li>You understand the fundamentals of machine learning such as model performance metrics, sampling, cross-validation, algorithm tradeoffs, and explainability. You have a passion for the field and are excited to make real-world impact. </li><li>You are familiar with cloud environments such as GCP, AWS, Azure or Snowflake. </li><li>You are familiar with or keen to learn best practices for code and model development such as version control and CI/CD. </li><li>You are a confident presenter eager to share important findings with the broader team and have the ability to adjust your explanation to your audience.</li><li>You are a team-player who likes to learn from others and will volunteer their time to help colleagues achieve their objectives.</li><li>You are comfortable working in a fast-moving environment and thrive from taking on new challenges. </li><li>You are fluent in English.</li></ul>What can you expect from us?<ul><li>Support and autonomy from a management team eager to realize the potential of AI/ML</li><li>Unique experience in a rapidly scaling VC-backed start-up environment</li><li>High degree of autonomy and a chance to work on potentially world-changing technology that can be a game changer to a range of industries and a key enabler for the energy transition</li><li>A total of 10% (on top and based on your monthly gross salary) will be paid by LeydenJar for pension and other insurances)</li><li>You get 25 days of vacation per year (based on 40 hours working week)</li><li>NS Business Card or reimbursement of 0.21 euro per km for commuting</li><li>Access to OpenUp mental health platform</li><li>Regular progress talks and support to reach your career goals</li><li>Great colleagues; at LeydenJar you will be part of a multi-national, ambitious, innovative and entrepreneurial team/20+ different nationalities!/</li><li>Thirsty Thursday – we have drinks every first Thursday of the month</li><li>We host internal FUN events each year and offer personal development perks.</li><li>We have fresh fruit delivered every Monday in both locations /Leiden and Eindhoven/</li></ul>Do you want to take on the challenge as Data Scientist?We are looking forward to your application! If you'd like to learn more about LeydenJar amazing team, see below: <a href="https://www.rtlnieuws.nl/nieuws/video/video/5357356/5-minuten-je-telefoon-opladen-met-deze-nederlandse-accu-kan-dat-straks"> </a> At LeydenJar we value diversity, and we provide equal opportunities to all applicants without regard to race, color, ethnicity, religion, gender, pregnancy/childbirth, age, national origin, sexual orientation, disability, etc. If there are two or more applicants of equal suitability for a certain position, LeydenJar can under circumstances decide to select applicants based on positive discrimination in full compliance with all relevant and applicable law.

Data Scientist

<div>Do you want to contribute to a more sustainable world? Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Can you not wait to dive into a VC-backed deep tech scale-up with the ambition to change the world?We are looking for an energetic HSSE Engineer to join our innovative and ambitious organization.</div> About LeydenJar LeydenJar is a high-tech company, developing pure silicon anodes for a lithium-ion battery that will change the world. We are proud that, here at LeydenJar, we:<ul><li>boost Li-ion battery energy density by 70% by using 10x thinner anodes</li><li>improved cycle life to &gt;450</li><li>achieved fast charging to 60% in under 10 min!</li></ul>We are currently still in an R&amp;D phase, but we are ready to start the actual production of anode foil. LeydenJar Plant One will open in 2026. Your mission As HSSE engineer, you will be responsible for health, safety, security and environment for the locations of LeydenJar regarding operational incident handling, changes, non-conformities and regular reporting, in accordance with the legal requirements and permits. <div>The activities will also include RIE updating, compliance and improvement projects and change projects for the growth of LeydenJar, and other QHSSE activities. The various responsibilities are under your guidance, using, improving and controlling a new HSSE system. You will lead the roadmap towards future certification.Your primary location will be Eindhoven, but you will also be supporting Leiden location. You are willing to travel on incidental base.You report to the QHSSE manager and have an important central role in the QHSSE team and organization. You work especially closely together with the production team and the laboratory managers. In this versatile role for lots of aspects, you will a chance to develop yourself by being leading and involved in the various projects of this quickly growing company.</div><div>About you:<ul><li>You have at least 5-years experience in a similar position</li><li>You have at least a completed HBO education in a relevant direction or HSSE specialized education at HBO level</li><li>You have experience in a production environment regarding HSSE activities</li><li>Experience with RIE, HAZOP and/or certification projects is a pre, especially ISO14001</li><li>You are able to multi-task and work independently in a fast-paced environment and act with a sense of urgency </li><li>You show initiative on improvement projects and are able to lead such projects</li><li>You communicate clearly and concisely, both orally and in writing</li></ul> What can you expect from us? <ul><li>Unique experience in a rapidly scaling VC-backed start-up environment</li><li>High degree of autonomy and a chance to work on potentially world-changing technology that can be a game changer to a range of industries and a key enabler for the energy transition</li><li>A total of 10% (on top and based on your monthly gross salary) will be paid by LeydenJar for pension and other insurances)</li><li>You get 25 days of vacation per year (based on 40 hours working week)</li><li>NS Business Card or reimbursement of 0.21 euro per km for commuting</li><li>Access to OpenUp mental health platform</li><li>Regular progress talks and support to reach your career goals</li><li>Great colleagues; at LeydenJar you will be part of a multi-national, ambitious, innovative and entrepreneurial team/20+ different nationalities!/</li><li>Thirsty Thursday – we have drinks every first Thursday of the month</li><li>We host internal FUN events each year and offer personal development perks.</li><li>We have fresh fruit delivered every Monday in both locations /Leiden and Eindhoven/</li></ul>Do you want to take on the challenge as HSSE Engineer?We are looking forward to your application! If you'd like to learn more about LeydenJar amazing team, see below: <a href="https://www.rtlnieuws.nl/nieuws/video/video/5357356/5-minuten-je-telefoon-opladen-met-deze-nederlandse-accu-kan-dat-straks"> </a> At LeydenJar we value diversity, and we provide equal opportunities to all applicants without regard to race, color, ethnicity, religion, gender, pregnancy/childbirth, age, national origin, sexual orientation, disability, etc. If there are two or more applicants of equal suitability for a certain position, LeydenJar can under circumstances decide to select applicants based on positive discrimination in full compliance with all relevant and applicable law. </div><div> </div>

HSSE engineer

Do you want to contribute to a more sustainable world? Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Can you not wait to dive into a VC-backed deep tech scale-up with the ambition to change the world? We are looking for an enthusiastic Head of Silicon R&amp;D to join our innovative and ambitious organization. About LeydenJarLeydenJar is a high-tech company, developing pure silicon anodes for a lithium-ion battery that will change the world. We are proud that, here at LeydenJar, we:<ul><li>boost Li-ion battery energy density by 70% by using 10x thinner anodes</li><li>improved cycle life to &gt;450</li><li>achieved fast charging to 60% in under 10 min!</li></ul>We are currently still in an R&amp;D phase, but we are ready to start the actual production of anode foil. LeydenJar Plant One will open in 2026. As Head of Silicon R&amp;D, you will run a department to develop better performing, cheaper, and more consistent product. You will be responsible for research, silicon development, data science, and patent management. You will report to CTO and collaborate closely with Battery R&amp;D, Product management, QA and Process development (Production team can be out due to waterfall). Your team’s main tasks and responsibilities will include:1. Research• Your team is responsible for researching innovative raw materials that enable better performing and low cost silicon products.• You team is responsible for exploring new deposition technologies that can bring us better performing and low cost silicon products.2. Silicon development• Your team is responsible for developing silicon products within &lt;2year scheme with new substrate, silicon morphology, and layer configurations in line with Silicon development Roadmap that is distilled from battery Roadmap.Responsible for defining and maintaining the DFMEA of the products• Your team is responsible for product specification and product change management following ISO standardized processes. 3. Data science development• Your team is responsible for substantiate the average and tolerance range of the product specification based on data science and statistical data analytics.• Your team is responsible for improving business intelligence of LeydenJar by creating concise dashboards for technical and supporting functions. • Your team is responsible for developing machine learning and artificial intelligence algorithms in-house in combination of internal and external resources. 4. Patent management• Your team overlook the patent landscape of LJT and manage patent drafting and filing together with inventors and external patent attorneys in line with LeydenJar IP portfolio roadmap.• Your team manage the quality of patents kept high quality by doing pre-screening of prior arts and based on which provide the patent office with convincing story line and information.5. Connecting cooperation with internal and external partners• You initiate and maintain effective networks and collaborations both within and outside the organization Who are you?<ul><li>You have a solid material science background, preferably in thin film (of nano to micro scale) technology. </li><li>You have more than 10years-working-knowledge of the material developing and manufacturing industry which let yourself equipped with industry standards such as FMEA, MSA, SixSigma, and so on. </li><li>You have good understanding on the potential of data science as an essential asset of business. You know, with experience, what to claim and how to make claims stronger in patents. </li><li>You are a proven project and people manager. </li><li>You have strong written and oral communication skills (upward, downward, and lateral), planning and organization skills, and strong analytical abilities. </li><li>You are capable of working autonomously and committing to agreed deliverables, and staying organized while assuming multiple responsibilities and tasks. </li><li>You are able to motivate, problem solve, deal with ambiguity and effectively prioritize business needs. </li><li>You are proficient in Microsoft Office applications (Excel, Word, PowerPoint, Outlook, One Note, etc) and other related operating systems. </li></ul> What can you expect from us? <ul><li>Unique experience in a rapidly scaling VC-backed start-up environment</li><li>High degree of autonomy and a chance to work on potentially world-changing technology that can be a game changer to a range of industries and a key enabler for the energy transition</li><li>A total of 10% (on top and based on your monthly gross salary) will be paid by LeydenJar for pension and other insurances)</li><li>You get 25 days of vacation per year (based on 40 hours working week)</li><li>NS Business Card or reimbursement of 0.21 euro per km for commuting</li><li>Access to OpenUp mental health platform</li><li>Regular progress talks and support to reach your career goals</li><li>Great colleagues; at LeydenJar you will be part of a multi-national, ambitious, innovative and entrepreneurial team/20+ different nationalities!/</li><li>Thirsty Thursday – we have drinks every first Thursday of the month</li><li>We host internal FUN events each year and offer personal development perks.</li><li>We have fresh fruit delivered every Monday in both locations /Leiden and Eindhoven/</li></ul>Do you want to take on the challenge as Head of Silicon R&amp;D?We are looking forward to your application! If you'd like to learn more about LeydenJar amazing team, see below: <a href="https://www.rtlnieuws.nl/nieuws/video/video/5357356/5-minuten-je-telefoon-opladen-met-deze-nederlandse-accu-kan-dat-straks"> </a> At LeydenJar we value diversity, and we provide equal opportunities to all applicants without regard to race, color, ethnicity, religion, gender, pregnancy/childbirth, age, national origin, sexual orientation, disability, etc. If there are two or more applicants of equal suitability for a certain position, LeydenJar can under circumstances decide to select applicants based on positive discrimination in full compliance with all relevant and applicable law.

Head of Silicon R&D

Do you want to contribute to a more sustainable world? Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Can you not wait to dive into a VC-backed deep tech scale-up with the ambition to change the world? We are looking for an energetic Junior Business Controller to join our innovative and ambitious organization. About LeydenJar LeydenJar is a high-tech company, developing pure silicon anodes for a lithium-ion battery that will change the world. We are proud that, here at LeydenJar, we:<ul><li>boost Li-ion battery energy density by 70% by using 10x thinner anodes</li><li>improved cycle life to &gt;450</li><li>achieved fast charging to 60% in under 10 min!</li></ul>We are currently still in an R&amp;D phase, but we are ready to start the actual production of anode foil. LeydenJar Plant One will open in 2026. Your mission You will support our team with daily operational responsibilities and financial administration, such as processing invoices, making payment proposals to suppliers, to name a few. You will also be involved in the implementation of our systems such as a new ERP. Experience with ERP (Exact, Oracle etc.) is a pre. About the jobThis role entails a wide variety of tasks and responsibilities. Perfect if you are getting your energy from switching between tasks and topics! In short: <ul><li>You will be the left- and right hand for our Finance team on part of the financial administration, supporting them in day-to-day tasks.</li><li>The team can build on your ability to support them with questions and tasks related to the office, internal policies and documentation needed.</li><li>You are acting as our office management guru, coordinating for example our internal- and external events, making sure we celebrate everyone's birthday, take care of an endless coffee supply and ensuring our offices are well organized and fun to work at.</li></ul>About you <ul><li>You are experienced and skilled in financial administration (at least 2 years of relevant work experience)</li><li>You have at least MBO4 or a higher professional education (HBO) level of thought and work</li><li>You get energy from managing a high variety of tasks and at the same time and know how to prioritize well to ensure you make your deadlines</li><li>You have a strong eye for detail, are discrete and able to work with sensitive data and information</li><li>You are resourceful and have an entrepreneurial mindset</li><li>You like having multiple responsibilities where you balance working together with others with working independently </li><li>Fluency in English and Dutch is a must, verbally as well as in writing. A Dutch work permit is required.</li></ul> What can you expect from us? <ul><li>Unique experience in a rapidly scaling VC-backed start-up environment</li><li>High degree of autonomy and a chance to work on potentially world-changing technology that can be a game changer to a range of industries and a key enabler for the energy transition</li><li>A total of 10% (on top and based on your monthly gross salary) will be paid by LeydenJar for pension and other insurances)</li><li>You get 25 days of vacation per year (based on 40 hours working week)</li><li>NS Business Card or reimbursement of 0.21 euro per km for commuting</li><li>Access to OpenUp mental health platform</li><li>Regular progress talks and support to reach your career goals</li><li>Great colleagues; at LeydenJar you will be part of a multi-national, ambitious, innovative and entrepreneurial team/20+ different nationalities!/</li><li>Thirsty Thursday – we have drinks every first Thursday of the month</li><li>We host internal FUN events each year and offer personal development perks.</li><li>We have fresh fruit delivered every Monday in both locations /Leiden and Eindhoven/</li></ul>Do you want to take on the challenge as Junior Business Controller?We are looking forward to your application! If you'd like to learn more about LeydenJar amazing team, see below: <a href="https://www.rtlnieuws.nl/nieuws/video/video/5357356/5-minuten-je-telefoon-opladen-met-deze-nederlandse-accu-kan-dat-straks"> </a> At LeydenJar we value diversity, and we provide equal opportunities to all applicants without regard to race, color, ethnicity, religion, gender, pregnancy/childbirth, age, national origin, sexual orientation, disability, etc. If there are two or more applicants of equal suitability for a certain position, LeydenJar can under circumstances decide to select applicants based on positive discrimination in full compliance with all relevant and applicable law.

Junior Business Controller

Do you want to contribute to a more sustainable world? Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Can you not wait to dive into a VC-backed deep tech scale-up with the ambition to change the world? We are looking for an energetic Executive Assistant to join our innovative and ambitious organization. About LeydenJar LeydenJar is a high-tech company, developing pure silicon anodes for a lithium-ion battery that will change the world. We are proud that, here at LeydenJar, we:<ul><li>boost Li-ion battery energy density by 70% by using 10x thinner anodes</li><li>improved cycle life to &gt;450</li><li>achieved fast charging to 60% in under 10 min!</li></ul>We are currently still in an R&amp;D phase, but we are ready to start the actual production of anode foil. LeydenJar Plant One will open in 2026. Your missionAs an Executive assistant, you will provide high-level support to our CEO, CFO and the other Leadership team member, to ensure they can efficiently lead their teams and achieve company's mission. Some of your main tasks and responsibilities will include: - taking care of the CEO and CFO email boxes;- update daily CEO and CFO to-do lists;- manage CEO and CFO's agendas- take minutes during Leadership team meetings and update the decision list;- arrange travels for the leadership team, consisting of CEO, CFO, CTO and COO;- coordinate meetings with supervisory board and investors. Who are you?For this role we are looking for a proactive and flexible candidate with good communication skills and positive attitude.• You possess excellent organizational and time management skills;• It is important that you have previous experience as Executive assistant, Personal assistnat or similar role, preferably in a scaling up environment.• You possess excellent English communication skills. Dutch knowledge is a plus.• Good level of knowledge in MS Office is a must.• Important competencies include: adaptability, responsibility, accuracy and initiative. What can you expect from us? <ul><li>Unique experience in a rapidly scaling VC-backed start-up environment</li><li>High degree of autonomy and a chance to work on potentially world-changing technology that can be a game changer to a range of industries and a key enabler for the energy transition</li><li>A total of 10% (on top and based on your monthly gross salary) will be paid by LeydenJar for pension and other insurances)</li><li>You get 25 days of vacation per year (based on 40 hours working week)</li><li>NS Business Card or reimbursement of 0.21 euro per km for commuting</li><li>Access to OpenUp mental health platform</li><li>Regular progress talks and support to reach your career goals</li><li>Great colleagues; at LeydenJar you will be part of a multi-national, ambitious, innovative and entrepreneurial team/20+ different nationalities!/</li><li>Thirsty Thursday – we have drinks every first Thursday of the month</li><li>We host internal FUN events each year and offer personal development perks.</li><li>We have fresh fruit delivered every Monday in both locations /Leiden and Eindhoven/</li></ul>Do you want to take on the challenge as Executive Assistant? We are looking forward to your application! If you'd like to learn more about LeydenJar amazing team, see below: <a href="https://www.rtlnieuws.nl/nieuws/video/video/5357356/5-minuten-je-telefoon-opladen-met-deze-nederlandse-accu-kan-dat-straks"> </a> At LeydenJar we value diversity, and we provide equal opportunities to all applicants without regard to race, color, ethnicity, religion, gender, pregnancy/childbirth, age, national origin, sexual orientation, disability, etc. If there are two or more applicants of equal suitability for a certain position, LeydenJar can under circumstances decide to select applicants based on positive discrimination in full compliance with all relevant and applicable law.

Executive Assistant

Do you want to contribute to a more sustainable world? Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Can you not wait to dive into a VC-backed deep tech scale-up with the ambition to change the world? We are looking for an enthusiastic Asset and Plant Development Manager to join our innovative and ambitious organization. About LeydenJarLeydenJar is a high-tech company, developing pure silicon anodes for a lithium-ion battery that might just change the world. We are proud that, here at LeydenJar, we:<ul><li>boost Li-ion battery energy density by 70% by using 10x thinner anodes</li><li>improved cycle life to &gt;450</li><li>reach fast charging to 60% in under 10 min</li></ul>We are ready to start scaled-up production of our pure silicon anode foil. LeydenJar Plant One will open in 2026. Your mission As Asset and Plant Development Manager, you are responsible for managing all aspects of several projects, starting with LeydenJar Plant One. You will report to the COO and lead us through the phases of factory engineering; tendering and contracting; construction; commissioning; and continued management of the factory asset thereon. You assume full responsibility of the PlantOne EPC project from the start, through to the commercial operation date and handover of operations to the production team, and continue forward with management of this new asset. In this role you will:<ul><li>Report to the COO.</li><li>Build and lead the project team, both internally and externally.</li><li>Champion continuous team improvement.</li><li>Be the primary point of contact on the project.</li><li>Develop the project execution schedule.</li><li>Manage all multi-disciplinary interfaces, such as civil, mechanical, electrical and chemical.</li><li>Execute the Health, Safety, Security &amp; Environment (HSSE) management for the project, including commissioning and delivering appropriate HSSE documentation.</li><li>Manage the engineering phase, which includes collecting and defining all Employers Requirements.</li><li>Gain internal alignment, collecting all relevant information, specifications and interfaces, to define and compile the Scope of Works.<ul><li>Here you will work closely with equipment development projects, existing production and process teams.</li></ul></li><li>Manage the tendering and contracting phase.</li><li>Develop and optimize the budget and execution plan in the tendering phase of the project.</li><li>Manage all aspects of the construction phase, including time, costs, quality &amp; safety, timely procurement &amp; subcontracting, as well as managing subcontracted scopes.</li><li>Execute project risk management, including risk identification and development of a mitigation action plan.</li><li>Optimize the project cost and outcomes, including identification of budgetary risks and opportunities.</li><li>Manage project-related change orders and claims.</li><li>Ensure sufficient project controls.</li><li>Report progress both internally and externally.</li><li>Ensure lessons learned are systematically captured to be usable in future projects.</li><li>Organize and document the project close-out, ensuring the plant remains a valuable future asset.</li></ul>About you:<ul><li>You have a Master's degree in Mechanical Engineering or equivalent;</li><li>You have minimum 10 years of proven experience in a project management role in mechanical and construction engineering. You are experienced in civil, mechanical, electrical and chemical construction projects;</li><li>Thorough contract management and experience in (Yellow) FIDIC multi-contracting, and or other similar contracts;</li><li>You are result-orientated and with excellent delegating skills;</li><li>You have comprehensive understanding of complex multi-disciplinary projects;</li><li>You possess excellent business decision making skills and experience;</li><li>Your communication skills in English and Dutch, both spoken and written are excellent;</li><li>You have the ability to work in a multidisciplinary, multicultural and dynamic environment.</li><li>Having experience with working in a startup is a plus.</li></ul><div><div><div> </div></div></div> What can you expect from us? <ul><li>Unique experience in a rapidly scaling VC-backed start-up environment</li><li>High degree of autonomy and a chance to work on potentially world-changing technology that can be a game changer to a range of industries and a key enabler for the energy transition</li><li>A total of 10% (on top and based on your monthly gross salary) will be paid by LeydenJar for pension and other insurances)</li><li>You get 25 days of vacation per year (based on 40 hours working week)</li><li>NS Business Card or reimbursement of 0.21 euro per km for commuting</li><li>Access to OpenUp mental health platform</li><li>Regular progress talks and support to reach your career goals</li><li>Great colleagues; at LeydenJar you will be part of a multi-national, ambitious, innovative and entrepreneurial team/20+ different nationalities!/</li><li>Thirsty Thursday – we have drinks every first Thursday of the month</li><li>We host internal FUN events each year and offer personal development perks.</li><li>We have fresh fruit delivered every Monday in both locations /Leiden and Eindhoven/</li></ul><ul><li>.</li></ul>Do you want to take on the challenge as Asset and Plant Development Manager?We are looking forward to your application! If you'd like to learn more about LeydenJar team, see below: At LeydenJar we value diversity, and we provide equal opportunities to all applicants without regard to race, color, ethnicity, religion, gender, pregnancy/childbirth, age, national origin, sexual orientation, disability, etc. If there are two or more applicants of equal suitability for a certain position, LeydenJar can under circumstances decide to select applicants based on positive discrimination in full compliance with all relevant and applicable law.

Asset and Plant Development Manager

Do you want to contribute to a more sustainable world? Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Can you not wait to dive into a VC-backed deep tech scale-up with the ambition to change the world? About LeydenJarLeydenJar is a high-tech company, developing pure silicon anodes for a lithium-ion battery that will change the world. We are proud that, here at LeydenJar, we:<ul><li>boost Li-ion battery energy density by 70% by using 10x thinner anodes</li><li>improved cycle life to &gt;450</li><li>achieved fast charging to 60% in under 10 min!</li></ul>We are currently still in an R&amp;D phase, but we are ready to start the actual production of anode foil. LeydenJar Plant One will open in 2026. Are you eligible to complete your internship in the Netherlands? Let us know what you can bring to our company! At LeydenJar we value diversity, and we provide equal opportunities to all applicants without regard to race, color, ethnicity, religion, gender, pregnancy/childbirth, age, national origin, sexual orientation, disability, etc. If there are two or more applicants of equal suitability for a certain position, LeydenJar can under circumstances decide to select applicants based on positive discrimination in full compliance with all relevant and applicable law.You recognize yourself in our values:  Dare to pioneerCreating a battery from a failed innovation from a completely different industry is daring. Daring to go for a 70% higher energy density instead of the yearly 3% is pioneering. Using new materials is pioneering. Building an international team is daring. Although LeydenJar is modest, there’s no denying its bravery. It is an important part of the DNA of LeydenJar. When faced with two identical options, employees are motivated to go for the most pioneering and daring option in order to innovate even more. Question everything - answer with data.LeydenJar is always challenging the status quo. That is how LeydenJar was founded, and that is how we keep pushing the limits. Everybody is invited to think along, there are no rules or dogmas. We bring suggested solutions and a willingness to discuss solutions, with no wrong answers. We share and respond to feedback with the best interest of our colleagues in mind and assume the same noble intent of our colleagues when they share and respond to feedback. We do, however, request solid answers, and back up our answers with data and research. Own setbacks and successWe are open about and stand united in obstacles, challenges and breakthroughs.We celebrate our successes, and we share and celebrate our failures with equal energy.We commit to overcoming the highest mountains, together. Prioritize actionWe are a young, fast-growing company with a can-do mentality.We prioritize action over no action.Taking action has brought us where we are now. Empower optimistic future We know why we’re here: the future is exciting, there are so many amazing innovations that can improve our world and make our lives more fun. The next generation batteries will not be possible without our technology. It will be unsafe, low in energy or not scalable. Without our technology, the most important electrifications will not be possible. We focus on the positive, we strive for positive change.

Looking for internship possibilities?

Do you want to contribute to a more sustainable world? Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Can you not wait to dive into a VC-backed deep tech scale-up with the ambition to change the world? We are looking for an enthusiastic Lab Technician to join our innovative and ambitious organization. About LeydenJarLeydenJar is a high-tech company, developing pure silicone anodes for a lithium-ion battery that will change the world. We are proud that, here at LeydenJar, we:<ul><li>boost Li-ion battery energy density by 70% by using 10x thinner anodes</li><li>improved cycle life to &gt;450</li><li>achieved fast charging to 60% in under 10 min!</li></ul>We are currently still in an R&amp;D phase, but we are ready to start the actual production of anode foil. LeydenJar Plant One will open in 2026. Your mission LeydenJar Technologies has a mission to deliver a solution, that is a package of technologies, to the lithium-ion battery industry. You wilWe are looking for a dedicated technician to boost productivity within our battery lab in Leiden. You will be part of a young, international and ambitious team that is determined to make an impact towards a better world with cleaner energy. You will be responsible for:<ul> <li>Making battery cells in the lab and analyzing the data from experiments;</li> <li>Managing lab plans and carrying out tasks to remain on schedule;</li> <li>Ensuring that the lab is a safe environment, by adhering to all Health, Safety and Security guidelines and procedures;</li> <li>Stock-taking and ordering materials;</li> <li>Optimising procedures and safety in the lab;</li></ul><ul></ul>What we expect from you:<ul> <li>You are detailed and thorough;</li> <li>You like being hands on and don’t enjoy sitting at a desk all day;</li> <li>You have a positive attitude and are full of energy. You are a driving part of our Lab in Leiden, and you want to make it run even better and safer;</li> <li>You carry out plans as agreed, but you are flexible to change if required;</li></ul>And the following qualifications:<ul><li>Applied science/College (MBO/HBO) degree in a technical discipline </li> <li>Good communication skills in English;</li> <li>Experience in a mechanical and / or electrical lab is a plus;</li> <li>Experience with some coding (Python) is a plus</li> <li>Experience with HSE implementation in a lab environment;</li> <li>Capability of CAD drawing is a plus;</li> <li>Good skills in MS Excel / Word / PowerPoint, and fine with learning new IT apps.</li></ul> What can you expect from us? <ul><li>Unique experience in a rapidly scaling VC-backed start-up environment</li><li>High degree of autonomy and a chance to work on potentially world-changing technology that can be a game changer to a range of industries and a key enabler for the energy transition</li><li>A total of 10% (on top and based on your monthly gross salary) will be paid by LeydenJar for pension and other insurances)</li><li>You get 25 days of vacation per year (based on 40 hours working week)</li><li>NS Business Card or reimbursement of 0.21 euro per km for commuting</li><li>Access to OpenUp mental health platform</li><li>Regular progress talks and support to reach your career goals</li><li>Great colleagues; at LeydenJar you will be part of a multi-national, ambitious, innovative and entrepreneurial team/20+ different nationalities!/</li><li>Thirsty Thursday – we have drinks every first Thursday of the month</li><li>We host internal FUN events each year and offer personal development perks.</li><li>We have fresh fruit delivered every Monday in both locations /Leiden and Eindhoven/</li></ul>Do you want to take on the challenge as a Lab Technician?We are looking forward to your application! If you'd like to learn more about LeydenJar amazing team, see below: At LeydenJar we value diversity, and we provide equal opportunities to all applicants without regard to race, color, ethnicity, religion, gender, pregnancy/childbirth, age, national origin, sexual orientation, disability, etc. If there are two or more applicants of equal suitability for a certain position, LeydenJar can under circumstances decide to select applicants based on positive discrimination in full compliance with all relevant and applicable law.

Laboratory Technician (battery R&D) Leiden

Do you want to contribute to a more sustainable world? Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Can you not wait to dive into a VC-backed deep tech scale-up with the ambition to change the world? We are looking for an enthusiastic Production Technician to join our innovative and ambitious organization. About LeydenJarLeydenJar is a high-tech company, developing pure silicone anodes for a lithium-ion battery that will change the world. We are proud that, here at LeydenJar, we:<ul><li>boost Li-ion battery energy density by 70% by using 10x thinner anodes</li><li>improved cycle life to &gt;450</li><li>achieved fast charging to 60% in under 10 min!</li></ul>We are currently still in an R&amp;D phase, but we are ready to start the actual production of anode foil. LeydenJar Plant One will open in 2026. We are looking for a dedicated Production Technician to support our pre-pilot operations, who enjoys working with high-tech equipment and can carry out repetitive tasks precisely. You are eager to learn and excited to work with us to make better batteries. Your work will be supervised by senior process engineers, and you will report to Head of Production. You will be part of a young, international, ambitious and diverse team that is determined to make a better world with cleaner energy. It is a full-time position and working from home is not possible. Your main working location will be in Eindhoven.  You will be responsible for: <ul> <li>Preparation PECVD production and R&amp;D machines </li> <li>Efficient production </li> <li>Support maintaining of the machines in close cooperation our partners</li></ul>Furthermore, you will assist with:<ul> <li>Process improvements to achieve a constant quality of our innovative products</li> <li>Quality control of the produced materials</li> <li>Initiatives to improve the machine, the maintenance, and the expanding production location</li></ul>About you:<ul><li>You have completed min MBO/equal level of education.</li><li>Working experience in production environment/ working with production inspection vacuum equipment, and/or roll-to-roll equipment is a plus.</li><li>You possess affinity to large, high-tech machines and you are comfortable in taking responsibility to finish the job on your own, once it is well explained.</li><li>You understand that working in a scale-up means working in an environment where many things happen and where plans change.</li><li>You find it easy to listen and talk to people and bring a smile to work.</li><li>You have good command of computers, e.g. MS 365 and ability to communicate in English or Dutch.</li></ul> What can you expect from us? <ul><li>Unique experience in a rapidly scaling VC-backed start-up environment</li><li>High degree of autonomy and a chance to work on potentially world-changing technology that can be a game changer to a range of industries and a key enabler for the energy transition</li><li>A total of 10% (on top and based on your monthly gross salary) will be paid by LeydenJar for pension and other insurances)</li><li>You get 25 days of vacation per year (based on 40 hours working week)</li><li>NS Business Card or reimbursement of 0.21 euro per km for commuting</li><li>Access to OpenUp mental health platform</li><li>Regular progress talks and support to reach your career goals</li><li>Great colleagues; at LeydenJar you will be part of a multi-national, ambitious, innovative and entrepreneurial team/20+ different nationalities!/</li><li>Thirsty Thursday – we have drinks every first Thursday of the month</li><li>We host internal FUN events each year and offer personal development perks.</li><li>We have fresh fruit delivered every Monday in both locations /Leiden and Eindhoven/</li></ul> Are you ready to take on the challenge as a Production Technician?We are looking forward to your application! At LeydenJar we value diversity, and we provide equal opportunities to all applicants without regard to race, color, ethnicity, religion, gender, pregnancy/childbirth, age, national origin, sexual orientation, disability, etc. If there are two or more applicants of equal suitability for a certain position, LeydenJar can under circumstances decide to select applicants based on positive discrimination in full compliance with all relevant and applicable law.

Production Technician

Do you want to contribute to a more sustainable world? Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Can you not wait to dive into a VC-backed deep tech scale-up with the ambition to change the world? About LeydenJarLeydenJar is a high-tech company, developing pure silicon anodes for a lithium-ion battery that will change the world. We are proud that, here at LeydenJar, we:<ul><li>boost Li-ion battery energy density by 70% by using 10x thinner anodes</li><li>improved cycle life to &gt;450</li><li>achieved fast charging to 60% in under 10 min!</li></ul>We are currently still in an R&amp;D phase, but we are ready to start the actual production of anode foil. LeydenJar Plant One will open in 2026. Interested to work for LeydenJar? Let us know what you can bring to our company! At LeydenJar we value diversity, and we provide equal opportunities to all applicants without regard to race, color, ethnicity, religion, gender, pregnancy/childbirth, age, national origin, sexual orientation, disability, etc. If there are two or more applicants of equal suitability for a certain position, LeydenJar can under circumstances decide to select applicants based on positive discrimination in full compliance with all relevant and applicable law.You recognize yourself in our values:  Dare to pioneerCreating a battery from a failed innovation from a completely different industry is daring. Daring to go for a 70% higher energy density instead of the yearly 3% is pioneering. Using new materials is pioneering. Building an international team is daring. Although LeydenJar is modest, there’s no denying its bravery. It is an important part of the DNA of LeydenJar. When faced with two identical options, employees are motivated to go for the most pioneering and daring option in order to innovate even more. Question everything - answer with data.LeydenJar is always challenging the status quo. That is how LeydenJar was founded, and that is how we keep pushing the limits. Everybody is invited to think along, there are no rules or dogmas. We bring suggested solutions and a willingness to discuss solutions, with no wrong answers. We share and respond to feedback with the best interest of our colleagues in mind and assume the same noble intent of our colleagues when they share and respond to feedback. We do, however, request solid answers, and back up our answers with data and research. Own setbacks and successWe are open about and stand united in obstacles, challenges and breakthroughs.We celebrate our successes, and we share and celebrate our failures with equal energy.We commit to overcoming the highest mountains, together. Prioritize actionWe are a young, fast-growing company with a can-do mentality.We prioritize action over no action.Taking action has brought us where we are now. Empower optimistic future We know why we’re here: the future is exciting, there are so many amazing innovations that can improve our world and make our lives more fun. The next generation batteries will not be possible without our technology. It will be unsafe, low in energy or not scalable. Without our technology, the most important electrifications will not be possible. We focus on the positive, we strive for positive change.

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LeydenJar Technologies

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