About Us

Energy. Just Better.

Ostrom is the fastest-growing green & digital energy provider in Germany. We are already delivering energy in 600+ cities and have won clients from over 220 different traditional utilities. We are currently a team of 15 and growing fast, and have raised > 5m USD in VC funding.

Our mission is to reinvent the German energy industry to be fair, smart and green.

  • ⚖️ Fair: Flexible, monthly rolling contract. One transparent tariff with no 12-24 month lock-ins for new & long-time customers.
  • 🌲 Green: Only 100% sustainable energy. We only buy from renewable energy sources, no compromise.
  • 📱 Smart: Digital-first power management. English & German signup & contracts, responsive live customer chat, everything in-app.

What You’ll Be Keeping Busy With

We looking for a Backend Engineer to join our team. As part of a cross-functional team, you will be developing modern APIs and automating workflows, check ​out our current stack here. ​

  1. Design and implement backend solutions from scratch.
  2. Involved in tech-stack decisions to choose the best frameworks, tools and processes for our team.
  3. Build a scalable renewable energy platform and automated jobs with cutting-edge technologies.

Your Profile

  • Minimum 3+ years experience in backend development.
  • Experience with Typescript and/or Python.
  • Comfortable with AWS services.
  • Experience designing APIs.
  • Experience with Relational Databases.
  • Working with CI/CD automation workflows (Docker, GitHub Actions)
  • Experience in high code quality, unit testing, integration testing and E2E testing.
  • Comfortable with greenfield projects.
  • Good communication skills and fluency in English.

Nice To Have

  • Experience with payments or CRM systems.

Feel free to share with us your Github/GitLab profile or open-source projects you contributed to.

Why Us?

  • Environmental Impact: Each customer who switches to Ostrom on average helps offset 1.5 tons of CO2 emissions per year compared to the average German energy mix.
  • Flexibility: We offer a flexible work model. Want to work remotely? No problem! Want to come into the office? We would love to have you! Our office is located in Berlin, Mitte which includes a roof terrace and is dog friendly.
  • Trust-based Team: A truly flat hierarchy and transparent company culture, everyone’s voice really matters. We have one daily call and we also hate bureaucratic meetings.
  • Relocation package: we wont let distance get in the way, we offer visa and relocation support.
  • Stock options: On top of offering a competitive salary you will have access to company shares to ensure you can truly be part of the journey.
  • Team events: We hold monthly team-events to ensure we can celebrate our achievements and weekly Friday drinks at the office!
  • Benefits: We offer various benefits from discounted electricity, gym membership, e-bike or e-moped subscription via DANCE, or monthly vouchers. The choice is yours!
  • Development budget: As your development matters to us, you will receive an annual budget to attend trainings and conferences of your choice.
  • Bring Your Stack Over: If you love certain tools or processes and we don’t have one yet, or you think it would be an improvement over what we have right now, please bring it over!





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