At LeydenJar Technologies, we’re on a mission to redefine the future of energy storage. Our goal is to become the world’s innovation leader in advanced battery anodes, empowering the next generation of batteries that drive progress.We are looking for a dedicated Laboratory Technician to support our pre-pilot battery cell manufacturing operations. If you enjoy hands-on work with cutting-edge equipment and take pride in precision and efficiency, this role is for you. You will become part of a young, international, and ambitious team driven to make a real impact toward a more sustainable future powered by clean energy.What will you be doing?<ul><li>Support the production and testing of next-generation battery cells.</li><li>Capture and analyse production and test data.</li><li>Maintain equipment and ensure efficient lab operations.</li><li>Help create a safe, clean, and well-organised working environment.</li><li>Manage materials and inventory to keep production running smoothly.</li><li>Drive improvements in lab processes, safety, quality, and efficiency.</li></ul>What do you bring?<ul><li>MBO/HBO degree in a technical field.</li><li>Strong communication skills in English.</li><li>Experience in a production, quality, chemical, mechanical, or electrical lab is a plus.</li><li>Knowledge of HSE practices in a lab or workshop environment is a plus.</li><li>Proficient in MS Office (Excel, Word, PowerPoint) and keen to learn new digital tools.</li><li>Hands-on, detail-oriented, and motivated to keep the lab safe, efficient, and continuously improving.</li><li>Eager to learn, adaptable to change, and reliable in delivering on commitments.</li></ul>Why LeydenJar?Our culture empowers our mission a the tech frontier, bonding more energy to bring you to new places. <ul><li>Grow &amp; own – you take ownership of your work and develop your career in a supportive environment.</li><li>Great benefits – pension plan, 25 vacation days, and travel reimbursement (€0.25/km or NS Business Card).</li><li>Continuous learning – access to online learning platform and opportunities for professional growth.</li><li>Diverse &amp; inclusive – Join an international team where every voice matters.</li><li>Strong community – Enjoy team events, lunches, and celebrations that bring us together.</li></ul>Are you ready to take on the challenge as a Laboratory Technician?We are looking forward to your application!We aim to make our recruitment process as transparent and enjoyable as possible. Depending on the role, the process may include interviews, assessments, reference checks, and pre-employment screening. 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.

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).


Laboratory Technician - Battery Production in R&D Leiden| Full-time| On-site

At LeydenJar Technologies, we’re on a mission to redefine the future of energy storage. Our goal is to become the world’s innovation leader in advanced battery anodes, empowering the next generation of batteries that drive progress.We are looking for a dedicated Laboratory Technician to support our pre-pilot battery cell manufacturing operations. If you enjoy hands-on work with cutting-edge equipment and take pride in precision and efficiency, this role is for you. You will become part of a young, international, and ambitious team driven to make a real impact toward a more sustainable future powered by clean energy.What will you be doing?<ul><li>Support the production and testing of next-generation battery cells.</li><li>Capture and analyse production and test data.</li><li>Maintain equipment and ensure efficient lab operations.</li><li>Help create a safe, clean, and well-organised working environment.</li><li>Manage materials and inventory to keep production running smoothly.</li><li>Drive improvements in lab processes, safety, quality, and efficiency.</li></ul>What do you bring?<ul><li>MBO/HBO degree in a technical field.</li><li>Strong communication skills in English.</li><li>Experience in a production, quality, chemical, mechanical, or electrical lab is a plus.</li><li>Knowledge of HSE practices in a lab or workshop environment is a plus.</li><li>Proficient in MS Office (Excel, Word, PowerPoint) and keen to learn new digital tools.</li><li>Hands-on, detail-oriented, and motivated to keep the lab safe, efficient, and continuously improving.</li><li>Eager to learn, adaptable to change, and reliable in delivering on commitments.</li></ul>Why LeydenJar?Our culture empowers our mission a the tech frontier, bonding more energy to bring you to new places. <ul><li>Grow &amp; own – you take ownership of your work and develop your career in a supportive environment.</li><li>Great benefits – pension plan, 25 vacation days, and travel reimbursement (€0.25/km or NS Business Card).</li><li>Continuous learning – access to online learning platform and opportunities for professional growth.</li><li>Diverse &amp; inclusive – Join an international team where every voice matters.</li><li>Strong community – Enjoy team events, lunches, and celebrations that bring us together.</li></ul>Are you ready to take on the challenge as a Laboratory Technician?We are looking forward to your application!We aim to make our recruitment process as transparent and enjoyable as possible. Depending on the role, the process may include interviews, assessments, reference checks, and pre-employment screening. 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 Production in R&D Leiden| Full-time| On-site

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LeydenJar Technologies

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