Software Engineer Elixir for E-Mobility and Renewable Energies (f/m/d)


Berlin, BE, DE Wildpoldsried, BY, DE Home Office, DE

Stellen-ID:  3032

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.

Team IoT develops and operates the backend for the integration of E-Mobility Chargers and Batteries for optimal use of renewable energies in all our markets. Our stakeholders are customers, partners of sonnen and internal teams like e.g. the sonnen Customer Portal, Virtual Power Plant (VPP), Technical Service.


Our common goal is to build a good product. We combine a long and broad experience around E-Mobility & IoT applications with a mindset, that problems can best be solved by code and collaboration. We foster decision making based on arguments by the people affected.


As part of one of our technical teams you will


  • Develop and operate the sonnen-IoT-Backend for E-Mobility-Chargers and sonnenBatteries

  • Design solutions for data ingestion, real-time processing, persistence and monitoring

  • Improve the scalability and fault tolerance of our systems

  • Design, analyze, and improve algorithms for optimized energy usage

  • Implement protocols, APIs and processes

  • Collaborate and share your knowledge with peer developers and stakeholders

  • Work in a remote team setup, optionally from one of the sonnen offices in Berlin or near Wildpoldsried

What you will need on that journey


  • Programming skills: Prior experience with Elixir/Erlang or motivation to learn it. Experience with another functional programming language (e.g. Clojure, OCaml, Haskell, or Scala) or distributed systems programming is a plus. We hire at all experience levels

  • Analytical and conceptual thinking

  • Code excellence: you write code that is tested and can be easily understood and maintained by others

  • Operational skills: Experience in maintaining systems, ideally with high load. Experience with Docker, Terraform, relational and NoSQL databases is a plus

  • Impact driven working style: Automation and decision-making based on evidence has become a habit for you

  • Fluent English and ideally the ability to have social conversations in 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
  • 30-32 days annual vacation with increasing team membership
  • Leasing of company (e-)bikes with up to 40% discount
  • Flexible working hours and home office option
  • Workation within the EU 
  • Mental health and wellbeing offering for you and your family members
  • 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
  • Discounts on sports memberships (Qualitrain) 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!

Jobsegment: Developer, Technology