About us

Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Do you want work with an ambitious and entrepreneurial team and with Fortune500 clients to bring LeydenJar's revolutionary product to market? Are you excited to dive in to a VC-backed deep tech scale-up company with the ambition to change the world? Then join us!

Our organisation

Leyden-Jar Tehcnologies was founded in 2016 as a spin-out from Dutch research organisation ECN (now TNO) and operates from two locations in The Netherlands. Our battery R&D, product development and administration are largely centred in Leiden and our production and process R&D are largely centred in Eindhoven. In the past 18 months, LeydenJar has tripled its organisation, growing to a team of 22 dedicated and ambitious professionals. Even more exciting, the next 18 months we are looking to triple again. LeydenJar's culture centers around entrepreneurship, openness and data-driven decision making.  LeydenJar is funded by a number of leading venture capital firms. 

Our technology

LeydenJar makes li-ion batteries based on a unique, patented pure silicon anode technology which increases the volumetric energy density of batteries by 70%, reduces CO2 emissions by 85% whilest also reducing costs. For this purpose, LeydenJar uses Plasma Enhanced Chemical Vapour Deposition as our key production technology. As we speak, our teams of battery scientists, production engineers and application engineers work hard to scale-up our production technology, further improve our battery specs and to work with leading Fortune500 clients to move from the R&D phase into the product phase. 

Excited? Let us know! 

We are looking for innovators, experimenters and entrepreneurs that share our mission to contribute to sustainability through developing and commercializing our breakthrough battery technology. Common vacancies in our team include those of battery scientist, application engineer and process/lab technician, but don’t hesitate to reach out if you feel that you bring something unique to the table that helps LeydenJar in its growth trajectory.

Join us

Current openings

Executive Assistant
  • Leiden, Netherlands
Senior Battery Researcher
Battery lab
  • Leiden, Netherlands
Senior Materials Scientist
Battery lab
  • Leiden, Netherlands
Open Application
  • Leiden/Eindhoven, Netherlands
Intern battery lab
Battery lab
  • Leiden, Netherlands
Business Development Manager
  • Leiden, Netherlands
Senior / Lead Application Engineer
  • Leiden, Netherlands


What we stand for

Growth and flexibility are in the core of LeydenJar’s scale-up path; our company core values are what makes us thrive: 


  • You face problems head on, take the initiative and inspire others to take action

  • You know how to think outside the box

  • You enjoy taking balanced risks and you thrive on rapidly changing circumstances


  • You believe in diversity and are open to the belief that both giving and receiving feedback is the fastest path to growth 

  • You practice what you preach: transparency, honesty and leading by example are no-brainers for you

Data driven: 

  • You turn to data as a first line of defence for most of the challenges you face

  • Building hypotheses, validating them and iterating your ideas is what makes you happy

We value transparency, facts and entrepreneurship. We believe in science and the science method to make progress.  We pride ourselves on our business principles.  This means that we believe in the Rule of Law, and we follow and abide by the advice of the Dutch Government on topical matters.