Fullstack Engineer (m/f/d)

Join the energy revolution with #teamsonnen!

At sonnen we pursue one clear goal: a future of clean, affordable energy for everyone. We empower our customers to become independent – from fossil fuels and rising electricity costs.

The key is our intelligent all-in-one energy system: PV modules, battery storage, electricity tariffs and wallbox – engineered and manufactured in Germany.

As the first and only company in Germany we also connect thousands of home batteries to create the virtual power plant sonnenVPP.

In short: we shape tomorrow’s energy world every day – and we’d love you to be part of it!

Your tasks on the path to the energy transition:

• Full-cycle development work: refinements, reviews, tests, deployment and production monitoring
• Maintain and extend our Ruby on Rails services
• Build state-of-the-art frontends with Hotwire & co.
• Expand GraphQL interfaces and RESTful endpoints (JSON:API)
• Turn acceptance criteria into RSpec tests
• Update and extend documentation
• Contribute to micro-services
• Drive and monitor CI/CD builds and deployments
• Agile collaboration in a Scrum team to troubleshoot and refactor
• Analyse logs and monitoring alerts (Datadog)

What you bring:

• 2+ years full-stack experience with Ruby on Rails, RSpec and GraphQL
• Strong command of CI/CD (GitLab/GitHub), AWS and monitoring (Datadog)
• Passion for clean code, OOP and software architecture
• Openness to feedback and constructive communication
• Very good written and spoken English