Jobs at LeydenJar (Now Hiring) — 2 open

About LeydenJar

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.

Why does this matter? Because the world needs higher energy density batteries not just for better consumer electronics, but for electric vehicles, e-flight, and beyond. While the battery industry typically advances by only 3% per year, our breakthrough pure silicon anode technology delivers an improvement of up to 70%ma true game changer. Often called the “holy grail” of the battery industry, our technology unlocks new possibilities for electrification, sustainability, and resilience in global supply chains.

What we do:

• We produce pure silicon anode rolls that fit seamlessly into existing battery cell manufacturing lines, enabling customers to make a quantum leap in performance or create entirely new product categories.

• Our initial focus is on consumer electronics, with automotive applications already in development.

• By leveraging semiconductor thin-film technology (plasma deposition) and scaling it to battery anodes, we’ve overcome the long-standing challenges of silicon in batteries, delivering durability and efficiency at scale.

To meet global demand, we’re scaling up:

• PlantOne in Eindhoven opens in 2026, producing anode rolls and validating our roll-to-roll production tools.

• PlantTwo, our large-scale production facility, will follow, establishing LeydenJar as a key player in the global battery market.

This is an enormous opportunity and an ambitious journey. It requires bold, creative, and diverse minds who share our passion for innovation and sustainability. At LeydenJar, we value different perspectives, inclusive collaboration, and gender equality because we know that diversity fuels breakthrough ideas.

We are looking for a dedicated QC Technician to support our production and 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. You will report to the VP Production and will work within the QC team and close to engineers. You will be part of a young, international, ambitious and diverse organization that is determined to make a better world with cleaner energy.

You will be available for 40 hrs per week. These can be flexible starting hours. Your main working location will be in Eindhoven.

You will be responsible for:

• Quality control of the produced materials and raw materials

• Preparation of materials for testing at the various laboratories

• Maintaining of the equipment in close cooperation with the suppliers

Furthermore, you will assist with:

• Planning of testing and communication to engineers, production and laboratories

• Improvement of test methods and system set up

• Ordering of required QC materials

About you:

• You have completed MBO/Chemical-Fysical Analist/or equal level of education

• You are available to start soon

• Working experience in quality laboratory and/or production environment is a pré

• You can do measurements on your own and take responsibility to finish the job, once it is well explained.

• You understand that working in a start-up means working in an environment where many things happen and where plans change

• You find it easy to listen and talk to people and bring a smile to work

• You can communicate in English and possibly Dutch and can work with excel, word and also with computer systems in general

Competences:

• Teamwork: You actively collaborate with colleagues, sharing knowledge and supporting others to achieve common goals.

• Flexibility: You adapt seamlessly to changing priorities, environments, and challenges, maintaining a positive and solution-oriented mindset.

• Commitment to Excellence: You focus on details and strive for the highest quality in everything you do.

• Execution: You take ownership of your tasks, ensuring timely and effective delivery of results.

• Initiative: You identify opportunities for improvement, take proactive steps, and contribute innovative ideas to drive progress.

Why LeydenJar?

• Unleash Your Potential: Step into a workplace where growth and ownership go hand in hand. We empower every individual regardless of background, gender, or identity to thrive and achieve their career aspirations.

• Pension Insurance : We will contribute to your pension insurance arrangement on the basis of, and subject to, the underlying administrative agreements between us and our pension insurance provider (currently Zwitserleven), as those agreements may be amended or replaced from time to time

• Recharge & Refresh: Enjoy 25 vacation days per year (based on full-time hours) because work-life balance is essential for everyone.

• Travel Made Easy: We cover your home-to-work travel costs with €0.25 per kilometer or provide an NS Business Card for hassle-free public transportation.

• Continuous Learning: Access our online learning platform (Udemy) to develop your skills and unlock new opportunities for personal and professional growth.

• Diverse, Inclusive & Equal: Be part of an international team of 20+ nationalities, where everyone’s voice matters, and where diversity, equity, and inclusion are more than values they’re actions.

• Community & Connection: From team-building events and monthly lunches to year-end celebrations and inclusive gatherings, we create spaces where everyone feels welcome and engaged.

Are you ready to take on the challenge as a QC 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.

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.