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).


Revolutionizing batteries with greener, cheaper, and higher energy density solutions.

About LeydenJar LeydenJar Technologies aims to become world’s innovation leader in advanced battery anodes to energize batteries for progress. High energy density of battery cells is an urgent and unmet need for a wide range of industries from consumer electronics to electric vehicles. By addressing the bottleneck of the battery anode, LeydenJar can improve this by 70% in an industry that can only improve 3% per year. Our pure silicon anode is regarded as the holy grail to achieve in the battery industry. Progress is not only about enabling new products, it also means a more sustainable supply chain, resilience and access to battery technology in geopolitical context and enabling electrification.Our business model is to provide pure silicon anode rolls that fit directly in the battery plants of cell partners, allowing our clients to make step change in their product performance, or to allow new product categories such as e-flight. Our immediate focus in on the consumer electronics industry, with first automotive application development starting in shortly. To produce pure silicon anodes, we have crossed over from semicon thin film technology (plasma deposition) to anode production. This has given us a unique product quality that can last long without the problems associated with silicon as a battery material. To produce this material at scale we have pioneered roll to roll production tools that we will deploy in PlantOne in Eindhoven, expected to open in 2026. We will produce rolls and validate the production tools, allowing us to ramp up to large commercial production in PlantTwo (location to be determined). Ramping up to become a leading player in the battery market is an enormous opportunity, but also daunting development that requires a team of energy dense professional leaders. We are looking for a dedicated Supply Chain Manager to create new insights within LeydenJar: You will be working within an entrepreneurial start-up - we are open-minded, data driven and innovative. 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.About the jobThe Supply chain manager is in charge of every stage of an organization’s supply chain, from purchasing raw materials to production. The role keeps track of logistics and updates the company’s inventory; analyzes operational performance and resolve issues. The Supply chain manager collaborates with vendors and suppliers to ensure all operations (e.g. shipping, delivery) meet quality and safety standards. You can be responsible for:<ul><li>Create the company’s supply chain strategy </li></ul><ul><li>Analyze data from shipping and delivering processes to find bottlenecks and other issues  </li></ul><ul><li>Evaluate and report on KPIs/OKRs  </li></ul><ul><li>Monitor logistics to make sure they run smoothly  </li></ul><ul><li>Maintain supply chain inventory and records </li></ul><ul><li>Find cost-effective solutions for supply chain processes </li></ul><ul><li>Resolve issues that come up (e.g. delays in delivery, accidents) </li></ul><ul><li>Collaborate with other departments to create coordinated plans for business growth </li></ul><ul><li>Develop and implement safety guidelines in all aspects of the supply chain (e.g. use of trucks, forklifts) </li></ul><ul><li>Ensure supply chain processes meet legal requirements and standards </li></ul><ul><li>Communicate and negotiate with suppliers and vendors to land more profitable deals </li></ul>Qualifications:<ul><li>Bachelor's degree in Business Administration, Supply Chain Management, Engineering, or a related field. </li></ul><ul><li>8+ years of working experience </li></ul><ul><li>Proficiency in procurement software and tools, such as ERP systems, e-procurement platforms, and supplier management applications. </li></ul><ul><li>Solid understanding of technical specifications, engineering drawings, and manufacturing processes </li></ul><ul><li>Knowledge of relevant regulations, compliance standards, and procurement and supply chain management best practices. </li></ul>Competencies: <ul><li>Outstanding negotiation skills  </li></ul><ul><li>Relationships management (with suppliers and internal stakeholders)  </li></ul><ul><li>Excellent analytical and problem-solving skills, with keen attention to detail and accuracy. </li></ul><ul><li>Strong communication and interpersonal skills, with the ability to collaborate effectively across different functions and levels of the organization. </li><li>Strong verbal and written communication skills in Dutch and English.</li></ul><ul><li>Ability to work under pressure, prioritize tasks, and manage multiple projects simultaneous</li></ul>Why LeydenJar?🌟 Unleash your potential: Dive into a realm where personal growth meets ownership, with the backing to achieve your career aspirations.💼 Benefits beyond the basics: Enjoy a treasure trove of perks and yes, there's fresh fruit every Monday because why not?⏰ Work your way: Embrace the freedom of flexible hours and hybrid working. 🍹 Thirsty for Fun: Join us every first Thursday for 'Thirsty Thursday,' where we unwind and share good vibes in a laid-back setting!🎉 Fun with a purpose: Dive into our calendar of internal events, mixing business with pleasure, and fuel your personal development with exclusive trainings and courses. Are you ready to take on the challenge as a Supply Chain Manager Intern ?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.

Supply Chain Manager

About LeydenJar LeydenJar Technologies aims to become world’s innovation leader in advanced battery anodes to energize batteries for progress. High energy density of battery cells is an urgent and unmet need for a wide range of industries from consumer electronics to electric vehicles. By addressing the bottleneck of the battery anode, LeydenJar can improve this by 70% in an industry that can only improve 3% per year. Our pure silicon anode is regarded as the holy grail to achieve in the battery industry. Progress is not only about enabling new products, it also means a more sustainable supply chain, resilience and access to battery technology in geopolitical context and enabling electrification.Our business model is to provide pure silicon anode rolls that fit directly in the battery plants of cell partners, allowing our clients to make step change in their product performance, or to allow new product categories such as e-flight. Our immediate focus in on the consumer electronics industry, with first automotive application development starting in shortly. To produce pure silicon anodes, we have crossed over from semicon thin film technology (plasma deposition) to anode production. This has given us a unique product quality that can last long without the problems associated with silicon as a battery material. To produce this material at scale we have pioneered roll to roll production tools that we will deploy in PlantOne in Eindhoven, expected to open in 2026. We will produce rolls and validate the production tools, allowing us to ramp up to large commercial production in PlantTwo (location to be determined). Ramping up to become a leading player in the battery market is an enormous opportunity, but also daunting development that requires a team of energy dense professional leadersWe are looking for a System Engineer PECVD that will be responsible for development, testing and validation of the PECVD subsystem. They work closely with the plasma scientist, process development and equipment development team to meet product targets, and ensure the seamless operation of critical R&amp;D infrastructure. This role requires a strong understanding of hardware, software and processes related to PECVD.Some of the key responsibilities are: <ul><li>Development of a novel PECVD source in collaboration with the plasma scientist and process team, bringing hands-on PECVD engineering expertise into the development team; </li></ul><ul><li>Leading testing and validation of PECVD subsystem, providing feedback to the equipment development team </li></ul><ul><li>System and concept design of PECVD related sub-system of the equipment; </li></ul><ul><li>Working closely with the Plasma Scientist, translating stakeholder's wishes into design specifications and requirements, helping him managing sub-system interactions </li></ul><ul><li>Guiding PECVD related work of external engineering companies </li></ul><ul><li>Keeping all necessary documentation in place and up to date; </li></ul><ul><li>Supporting improvements and upgrades of existing equipment from the PECVD point of view. </li></ul><ul><li>Ensuring high quality of engineering and design work fit for PECVD process; </li></ul><ul><li>Reviewing and challenging system design in relation to PECVD competence. </li></ul><ul><li>Spreading your expertise amongst your colleagues. </li></ul><ul><li>Lead PECVD productivity improvement efforts. </li></ul>Requirements:<ul><li>Master or bachelor's degree in applied physics, mechanical engineering,  process engineering or similar. </li></ul><ul><li>5+ years of working experience designing, testing and working with PECVD systems; </li></ul><ul><li>5+ years of experience in high-tech equipment and development; </li></ul><ul><li>Experience managing suppliers and engineering partners is a must </li></ul><ul><li>Proficiency in a 3D CAD is preferred; </li></ul><ul><li>Innovative mindset, analytical skills and solution oriented; </li></ul><ul><li>Excellent problem-solving skills, with the ability to diagnose and resolve complex technical issues. </li></ul><ul><li>Strong communication and collaboration skills, with the ability to work effectively in cross-functional teams. Why LeydenJar?</li></ul>🌟 Unleash your potential: Dive into a realm where personal growth meets ownership, with the backing to achieve your career aspirations.💼 Benefits beyond the basics from a comprehensive pension plan to travel reimbursement, insurance coverage, and even a mental health platform. And yes, there's fresh fruit every Monday because why not?🍹 Thirsty for Fun: Join us every first Thursday for 'Thirsty Thursday,' where we unwind and share good vibes in a laid-back setting!🎉 Fun with a purpose: Dive into our calendar of internal events, mixing business with pleasure, and fuel your personal development with exclusive trainings and courses.Are you ready to take on the challenge as a System Engineer PECVD?We are looking forward to your application!If you'd like to learn more about LeydenJar's 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.

System Engineer PECVD

About LeydenJar LeydenJar Technologies aims to become world’s innovation leader in advanced battery anodes to energize batteries for progress. High energy density of battery cells is an urgent and unmet need for a wide range of industries from consumer electronics to electric vehicles. By addressing the bottleneck of the battery anode, LeydenJar can improve this by 70% in an industry that can only improve 3% per year. Our pure silicon anode is regarded as the holy grail to achieve in the battery industry. Progress is not only about enabling new products, it also means a more sustainable supply chain, resilience and access to battery technology in geopolitical context and enabling electrification.Our business model is to provide pure silicon anode rolls that fit directly in the battery plants of cell partners, allowing our clients to make step change in their product performance, or to allow new product categories such as e-flight. Our immediate focus in on the consumer electronics industry, with first automotive application development starting in shortly. To produce pure silicon anodes, we have crossed over from semicon thin film technology (plasma deposition) to anode production. This has given us a unique product quality that can last long without the problems associated with silicon as a battery material. To produce this material at scale we have pioneered roll to roll production tools that we will deploy in PlantOne in Eindhoven, expected to open in 2026. We will produce rolls and validate the production tools, allowing us to ramp up to large commercial production in PlantTwo (location to be determined). Ramping up to become a leading player in the battery market is an enormous opportunity, but also daunting development that requires a team of energy dense professional leaders. We are looking for a dedicated Laboratory Technician to support our pre-pilot battery cell manufacturing operations, someone who enjoys working with high-tech equipment and working with their hands, and can ensure that manufacturing processes are carried out precisely and efficiently. 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>Production of battery cells in the lab; </li><li>Logging/processing data from the production builds;</li><li>Executing tests of battery cells using electrical equipment;</li><li>Working according to lab planning and carrying out tasks to remain on schedule;</li><li>Maintenance of assigned machinery;</li><li>Ensuring that the lab is a clean and safe environment, by adhering to all Health, Safety and Security guidelines and procedures;</li><li>Stock-taking and ordering materials;</li><li>Continuous improvement of procedures and safety in the lab.</li></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 behind 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 as required</li></ul><ul><li>Applied science/College (MBO/HBO) degree in a technical discipline;</li><li>Good communication skills in English;</li><li>Experience in a chemical / 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/workshop 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><li>Must be an EU citizen (so you can freely work in The Netherlands) or be in possession of a valid residence permit to work in The Netherlands.</li></ul>Why LeydenJar?🌟 Unleash your potential: Dive into a realm where personal growth meets ownership, with the backing to achieve your career aspirations.💼 Benefits beyond the basics: Enjoy a treasure trove of perks, from a comprehensive pension plan to travel reimbursement, insurance coverage, and even a mental health platform. And yes, there's fresh fruit every Monday because why not?🍹 Thirsty for Fun: Join us every first Thursday for 'Thirsty Thursday,' where we unwind and share good vibes in a laid-back setting!🎉 Fun with a purpose: Dive into our calendar of internal events, mixing business with pleasure, and fuel your personal development with exclusive trainings and courses.Are you ready to take on the challenge as a Laboratory Technician?We are looking forward to your application!If you'd like to learn more about LeydenJar's 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

About LeydenJar LeydenJar Technologies aims to become world’s innovation leader in advanced battery anodes to energize batteries for progress. High energy density of battery cells is an urgent and unmet need for a wide range of industries from consumer electronics to electric vehicles. By addressing the bottleneck of the battery anode, LeydenJar can improve this by 70% in an industry that can only improve 3% per year. Our pure silicon anode is regarded as the holy grail to achieve in the battery industry. Progress is not only about enabling new products, it also means a more sustainable supply chain, resilience and access to battery technology in geopolitical context and enabling electrification.Our business model is to provide pure silicon anode rolls that fit directly in the battery plants of cell partners, allowing our clients to make step change in their product performance, or to allow new product categories such as e-flight. Our immediate focus in on the consumer electronics industry, with first automotive application development starting in shortly. To produce pure silicon anodes, we have crossed over from semicon thin film technology (plasma deposition) to anode production. This has given us a unique product quality that can last long without the problems associated with silicon as a battery material. To produce this material at scale we have pioneered roll to roll production tools that we will deploy in PlantOne in Eindhoven, expected to open in 2026. We will produce rolls and validate the production tools, allowing us to ramp up to large commercial production in PlantTwo (location to be determined). Ramping up to become a leading player in the battery market is an enormous opportunity, but also daunting development that requires a team of energy dense professional leaders. We are looking for a dedicated intern on machine learning to create new insights within LeydenJar: You will be working within an entrepreneurial start-up - we are open-minded, data driven and innovative. 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.  About the jobAs a Machine learning/Data science intern in the Battery R&amp;D team, you will play a key role in the development of new electrolytes to boost our anode’s performance. Currently we are scaling up our testing capabilities for electrolyte testing. We need you to help us make smart decisions and finding the optimal electrolyte. You will be working closely together with experienced battery scientists and data science professionals. The primary location for work will be Leiden. It is acceptable to work remotely one day a week. The minimum duration of the internship is 6 months. You can be responsible for: <ul><li>Use our machine learning model to suggest new electrolyte formulations </li></ul><ul><li>Querry, join and clean data from our Azure database. </li></ul><ul><li>Implement new features in the machine learning model.  </li></ul><ul><li>Test new models to improve the suggested electrolytes. </li></ul><ul><li>Make the machine learning model usable for our scientist.</li></ul>About you:<ul><li>University (WO) degree in a technical discipline e.g., Data Science, Computer Science, Engineering, Physics, Chemistry or similar. </li></ul><ul><li>You have prior experience in programming and machine learning, ideally with Python </li></ul><ul><li>You have experience with SQL and GIT or are willing to learn. </li></ul><ul><li>Good communication skills in English. </li></ul><ul><li>Experience in a mechanical and / or electrical lab is a plus. </li></ul><ul><li>Good skills in MS Excel / Word / PowerPoint, and fine with learning new IT apps. </li></ul><ul><li>You have a positive attitude and are full of energy. </li></ul><ul><li>You are enrolled in a university and need to complete an internship as part of your program. </li></ul><ul><li>A possible start date is the beginning of May. </li></ul>What can you expect from us ?  <ul><li>Unique experience in a rapidly scaling VC-backed start-up environment.</li></ul><ul><li>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></ul><ul><li>Great colleagues; at LeydenJar you will be part of a multi-national, ambitious, innovative and entrepreneurial team/20+ different nationalities!</li></ul>Why LeydenJar?🌟 Unleash your potential: Dive into a realm where personal growth meets ownership, with the backing to achieve your career aspirations.💼 Benefits beyond the basics: Enjoy a treasure trove of perks and yes, there's fresh fruit every Monday because why not?⏰ Work your way: Embrace the freedom of flexible hours and hybrid working. 🍹 Thirsty for Fun: Join us every first Thursday for 'Thirsty Thursday,' where we unwind and share good vibes in a laid-back setting!🎉 Fun with a purpose: Dive into our calendar of internal events, mixing business with pleasure, and fuel your personal development with exclusive trainings and courses. Are you ready to take on the challenge as a Machine Learning/Data Science Intern ?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.

Machine Learning/Data Science Internship

Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Are you all set to dive into a VC-backed deep tech scale-up with the ambition to change the world?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 an System Software Architect to join us in our mission to boost battery technology.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;500</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 2027.About the job Leydenjar is developing a production machine together with suppliers. The role of the system software architect is to lead the way in the software architecture development of our new machine and to guide/steer our suppliers to accomplish this milestone within the given time, budget and requested quality.Some of your main responsibilities include: <ul><li>Work closely with the mechanical and the process engineers.</li><li>Work closely with the other system architect and system engineers.</li><li>Roll out the modular and future proof software architecture for the control of the production machine.</li><li>Work in close collaboration with external suppliers</li><li>Review work done by the software team from the supplier</li><li>Put together the requirements with help of the equipment, process and production engineers.</li><li>Maintain the Software Requirements Specifications (in Polarion)</li><li>Maintain Project Documentation</li><li>Maintain the knowledge inside Leydenjar to be able to support users after commissioning (training, troubleshooting, additional component development and fixes)</li><li>Collaborate with data scientists and IT department</li></ul>About you: <ul><li>You have min 5+ years of working experience in software development in a machine development environment in server-client architecture</li><li>You have experience in Data interface technologies: OPC UA , Profinet, RS485</li><li>You posses test driven development mindset</li><li>You have knowledge of Model Driven Development</li><li>Experience working with change management is a plus</li><li>Experience in commissioning processes e.g. FAT / SAT is an advantage</li><li>Familiarity with Supermodels, PLC programming and Siemens Edge devices is a plus</li><li>Familiarity with safety standards and regulations (ISO IEC) is an advantage</li><li>You have flexible/adaptive mindset (able to adapt to changing circumstances)</li><li>You are pragmatic (able to set priorities based on limited information and act accordingly)</li><li>You are action oriented and result driven teamplayer</li><li>You have deep understanding of Software Development</li><li>You have excellent communication skills Why LeydenJar?🌟 Unleash your potential: Dive into a realm where personal growth meets ownership, with the backing to achieve your career aspirations.💼 Benefits beyond the basics: Enjoy a treasure trove of perks, from a comprehensive pension plan to travel reimbursement, insurance coverage, and even a mental health platform. And yes, there's fresh fruit every Monday because why not?🍹 Thirsty for Fun: Join us every first Thursday for 'Thirsty Thursday,' where we unwind and share good vibes in a laid-back setting!🎉 Fun with a purpose: Dive into our calendar of internal events, mixing business with pleasure, and fuel your personal development with exclusive trainings and courses. Do you want to take on the challenge? 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.</li></ul>

System Software Architect

About LeydenJar LeydenJar Technologies aims to become world’s innovation leader in advanced battery anodes to energize batteries for progress. High energy density of battery cells is an urgent and unmet need for a wide range of industries from consumer electronics to electric vehicles. By addressing the bottleneck of the battery anode, LeydenJar can improve this by 70% in an industry that can only improve 3% per year. Our pure silicon anode is regarded as the holy grail to achieve in the battery industry. Progress is not only about enabling new products, it also means a more sustainable supply chain, resilience and access to battery technology in geopolitical context and enabling electrification.Our business model is to provide pure silicon anode rolls that fit directly in the battery plants of cell partners, allowing our clients to make step change in their product performance, or to allow new product categories such as e-flight. Our immediate focus in on the consumer electronics industry, with first automotive application development starting in shortly. To produce pure silicon anodes, we have crossed over from semicon thin film technology (plasma deposition) to anode production. This has given us a unique product quality that can last long without the problems associated with silicon as a battery material. To produce this material at scale we have pioneered roll to roll production tools that we will deploy in PlantOne in Eindhoven, expected to open in 2026. We will produce rolls and validate the production tools, allowing us to ramp up to large commercial production in PlantTwo (location to be determined). Ramping up to become a leading player in the battery market is an enormous opportunity, but also daunting development that requires a team of energy dense professional leaders.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 B2B Product Marketing Internship to join our innovative and ambitious organization. You are eager to learn and excited to work with us to make better batteries. You will work close together with technicians, battery engineers,  production process engineers and other departments . You will report to Business Developer.  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. You will mainly be working in Leiden, and may occasionally work in Eindhoven.You will be responsible for:<ul><li>Conduct market research to identify trends, competitive landscape, and customer needs in the battery industry. </li><li>Analyze data to provide insights for product development and marketing strategies.</li><li>Assist in the development of new battery products by collaborating with cross-functional teams including engineering, manufacturing, and sales. Provide input on product features, specifications, and pricing based on market research and customer feedback.</li><li>Support the creation and execution of marketing campaigns to promote our battery products. This includes content creation for social media, website, and marketing materials</li><li>Assist in managing digital marketing channels such as email marketing,  advertising, and social media ads</li><li>Engage with customers through various channels to gather feedback, address inquiries, and build relationships. </li><li>If necessary, we may require you to perform activities normally undertaken by others or to take on additional activities.</li></ul>About You: <ul><li>Currently enrolled in a Bachelor’s or Master’s degree program in Marketing, Business, Engineering, or related field.</li><li>Strong analytical skills with the ability to gather, analyze, and interpret data.</li><li>Excellent written and verbal communication skills.</li><li>Proficiency in Microsoft Office suite and familiarity with digital marketing tools/platforms.</li><li>Ability to work independently as well as collaboratively in a fast-paced environment.</li><li>You are eligible to complete your internship in the Netherlands. </li></ul>Why LeydenJar?🌟 Unleash your potential: Dive into a realm where personal growth meets ownership, with the backing to achieve your career aspirations.💼 Benefits beyond the basics:  There's fresh fruit every Monday ⏰ Work your way: Embrace the freedom of flexible hours and hybrid working. 🍹 Thirsty for Fun: Join us every first Thursday for 'Thirsty Thursday,' where we unwind and share good vibes in a laid-back setting!🎉 Fun with a purpose: Dive into our calendar of internal events, mixing business with pleasure, and fuel your personal development with exclusive trainings and courses. Are you ready to take on the challenge as a B2B Product Marketing Intern?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.

B2B Product Marketing  Internship

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? 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.

LeydenJar Technologies

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Jobs (8)

Supply Chain Manager

Supply Chain Manager

System Engineer PECVD

System Engineer PECVD

Laboratory Technician (battery R&D) Leiden

Laboratory Technician (battery R&D) Leiden

Machine Learning/Data Science Internship

Machine Learning/Data Science Internship

System Software Architect

System Software Architect

B2B Product Marketing Internship

B2B Product Marketing Internship

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Looking for internship possibilities?

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