Battery Expert for Lithium-Ion Cells (f/m/d)


Wildpoldsried, BY, DE

Stellen-ID:  2845

At the earliest date possible we are looking for support for our #teamsonnen

Clean and affordable energy for all is one of the greatest challenges of our time. Sonnen has been committed to this mission since 2010 and is now represented in Europe, the USA and Australia with over 1,000 team members globally. In Germany, our offices are located in the beautiful Wildpoldsried (Allgäu) and the vibrating heart of Berlin Kreuzberg.

At sonnen, we are building the energy system of the future. To this end, we are developing new technologies and business models that have not existed before. Whether intelligent power storage, virtual power plants or digital services - we set the trends of a new energy world. That means, among other things, the inexpensive production and storage of renewable energy and the intelligent networking of producers and consumers. sonnen thereby gives people around the world the opportunity to become independent of fossil fuels and conventional energy supplier.

We are growing steadily and are looking for people who want to join us in our vision of clean and affordable energy for all while making a positive impact on climate change.

We are looking for a junior to senior level cell expert to support our dynamic battery development team. You will work together with our battery specialists and test engineers on exciting projects around our own lithium-ion modules.


What you will do to help drive energy transition


  • Development, design and execution of test series and strategies
  • Provide assessment and troubleshooting during battery development, testing and operation
  • Modeling and simulation of lithium-ion cells
  • Support the qualification of new battery cells
  • State estimation of lithium-ion batteries



What you will need on that journey


  • A degree in a technical study like Electrical Engineering, Physics, Chemistry or similar fields
  • In-depth knowledge of the functions in lithium-ion cells
  • Knowledge in MATLAB/Simulink or Python
  • Ideally experience in cell qualification in cooperation with suppliers
  • Willingness to work together in a team, but with the ability to advance your work independently
  • Fluency in english or german

What you can expect at sonnen:

  • An atmosphere of openness, tolerance and mutual respect, where innovation is expected and encouraged
  • The option of working full- or part-time for every position
  • 29-32 days annual vacation with increasing team membership
  • Leasing of company bikes with up to 40% discount
  • Flexible working hours and home office option
  • Workation within the EU
  • Free German, English as well as online yoga and body art courses
  • Soft drinks, fruits and cereals in our offices
  • Regular team and company events
  • We love dogs! You too? Feel free to bring your fellow friend to our offices
  • Other benefits, such as discounts on sports memberships and other services or products

You feel we are a match? Apply now and help us to shape the energy transition together. We look forward to welcoming you to #teamsonnen!

sonnen - energy is yours!