Junior Test Engineer (w/m/x) Solar Integration

Permanent Employment, Full-time · München

Your tasks

  • In your role as Test Engineer (Solar Integration) (f/m/x) you will be responsible for all electrical and optical tests to characterize our solar integration products (especially DC/DC converters, photovoltaic modules) and thus contribute significantly to their further development.
  • The construction, operation and maintenance of our solar simulator for individual photovoltaic modules and complete vehicles is one of your main tasks, as are photographic quality inspections and electrical measurements in order to develop a comprehensive diagnostic system and information network for early damage detection.
  • Your work results will also contribute significantly to validating and refining our model for solar range calculation. Optimally, you will also be able to get hands-on here.
  • To ensure a smooth transition from test planning to execution, you will work closely with the relevant teams in our Sono Solar group as well as other vehicle development teams.
  • You develop evaluation methods, testing concepts and scenarios that drive product development and solar model improvements.
  • In coordination with the specialist departments, you define target values in order to ensure that vehicle requirements are met.
  • You are also responsible for analysing and documenting the test results.
  • You initiate efficient solution finding and handling of risks that can occur in the various development phases of the product.
  • You communicate and represent the test results with the internal specialist teams and with development service providers and suppliers.


  • You feel at home in the world of photovoltaics. You can tell so if you get all warm and fuzzy when you hear basic terms like "IV curve tracing", "EL Photography", "MPPT", "Solar Irradiance" or "Voc at STC".
  • You have relevant experience in an environment with a wide variety of measurement equipment, test chambers, and electrically-focused infrastructure.
  • You can't sleep soundly before measurement campaigns because of anticipation, don't like to go to bed when an abnormal phenomenon is not yet understood or fixed, and are constantly busy during the day setting up your measurement environment to be even more accurate and efficient.
  • You have a natural hands-on mentality and are able to apply a logic-based problem-solving methodology to any challenge.
  • Clean documentation of measurement results and conclusions on open knowledge management platforms is not an annoying evil to you, but a new drive and source for new ideas.
  • If you are proficient in Python and possibly other programming languages, that's a plus.
  • Flexibility and pro-activity are your strengths. Where there is a will, there is a way.
  • Fluent English is a must - fluent German a plus.

What to expect:

  • Probably the best team in the world. You will never want to see other faces again on Monday morning in the group check-in ;-)
  • A young company where missing structures or processes are met with creative ideas and lots of creative energy.
  • A culture of appreciation, where successes are celebrated just as much as mistakes.
  • Flexible working hours, plus Trello, Confluence & Slack instead of paper.


For you to consider before applying our job offer: In a small company organized the way we are, the traditional employer-employee relationship is replaced with a partnership. You cannot expect the same service, support, and infrastructure as you would in a large organization. Things you miss might need to be initiated and created by you. You are regarded as someone who is really important in terms of how our company is doing, not just as someone who comes in and does their job. You will have more responsibility for the whole picture, and you will also be able to have a greater impact than in a larger organization. You will feel a bit more insecure than you might in a larger organization. How the company is doing financially has a more direct correlation to your employment. The owners will work together with you, but they will not manage the company - you and your colleagues will. You will be required to contribute and take initiative. You will have to adapt to the fact that not everything will be in place, taken care of or running perfectly. To work in this way open and straightforward communication is essential. This is a strong part of our culture.