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Senior Backend Developer, Energy Retail Platform (m/f/d)


Berlin, BE, DE Wildpoldsried, BY, DE

Stellen-ID:  167

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

At sonnen, we believe clean, affordable, and reliable energy for all is one of the greatest challenges of our time. With over 40,000 sonnenBatterie-systems installed worldwide, sonnen is a proven global leader in intelligent energy management solutions providing greater energy control for residential customers through increased solar self-consumption, reduced peak energy usage and reliable backup power during outages – contributing to a cleaner and more reliable energy future.

sonnen has won several awards for its energy innovations and sonnenBatterie products, including Fast Company’s Top 10 Most Innovative Companies in Energy, the 2017 Zayed Energy Innovation Award, MIT’s Technology Review’s 50 Smartest Companies in 2016, Global Cleantech 100 for 2015-2017, Greentech Media’s 2016 Grid Edge Award for innovation, and Cleantech’s 2015 Company of the Year Award in both Israel and Europe.

Main Responsibilities:

  • Co-create and improve our global energy retail platform, which acts as a backend for sonnen's innovative business models for end customers and partners.
  • Develop using modern open source frameworks and tools like Gitlab, Python, AWS Lambda, etc.
  • Continuous deliver software in an agile scaled scrum setup
  • Share your concepts and knowledge with your team colleagues in Backlog Refinements, Sprint Reviews, Code Reviews and be open to suggestions for improvement
  • Improve constantly your Scrum, DevOps and Continuous Delivery skills and abilities
  • Keep your knowledge up to date with training courses, workshops and user groups



  • Very good experience in the development of backend services
  • Very good knowledge of Python or very good knowledge of Java, Scala (or a comparable programming language) and high motivation to jumpstart with Python Backend development
  • Good knowledge of AWS Services (e.g. EC2, AWS API Gateway, Lambda, Amazon S3)
  • Experience with project management software (Jira, Confluence), version management (Git) as well as relational databases and document-based databases
  • Strong conceptual & analytical skills
  • Hands-on mentality, ability to work in a team, strong communication skills as well as a goal- and solution-oriented way of thinking and working
  • Experience in test-driven development and continuous delivery
  • Good knowledge of English, ideally also German


What we offer:

  • Participation in the creation of worldwide, innovative energy products that combines power services and renewable energy hardware
  • Steep learning curve in understanding what matters in the energy domain

sonnen – energy is yours!

Jobsegment: Developer, Java, Information Technology, Programmer, Project Manager, Technology