Backend Developer

At BUZZN, we are building an ecosystem for the future of decentralised energy through tools that help the environment and human beings take center stage – not technology, money, and bureaucracy.

For this we seek a software developer who is enthusiastic about building products and has the following interests and skills.

  • background in software development, ideally with a degree in Computer Science, Electronics, Mathematics or similar
  • ideally (yet not a must) some experience with Ruby (frameworks other than Ruby on Rails)
  • knowledge of DRY principle
  • knowledge of designing modern REST or GraphQL(ish) APIs
  • understanding of object-oriented programming and test-driven development
  • understanding of writing tools that talk HTTP
  • start-up attitude, self-motivation and excellent communication skills
  • German language skills
  • penchant for the decentral (energy) revolution 

Our most important product is a Web Platform that brings together energy consumers and producers. The backend is written in Ruby with Roda whereas the frontend is written in Typescript and uses React and Redux.  We also use Rust in other projects. We heavily use software tests, such as unit tests and integration tests.

Sounds like you? These could be your responsibilities:

  • contributing to a modern FLOSS web application
  • designing and maintaining a robust hosting solution (we are open to Kubernetes and NixOS)
  • writing tools and libraries
  • shaping the future of the company with your ideas and actions

The position is with flexible hours (80-100%). The center of operation is in Munich, Germany.  We currently have two co-working days per week, where we meet in our Munich office, and schedule additional co-working days as required. We work the rest of the week remotely.

If you are interested, write to Justus at and share

  • your motivation and track record so far
  • A copy of your CV with a link to your GitHub
  • 2-3 references, one in which is preferably from your last engagement
  • possible start date
  • expected income