Mid-level Backend Engineer (m/f/d)
OstromBerlin, Germany
Posted April 21, 2026
Full Time
About the Company
Ostrom is Germany’s fastest-growing digital green energy provider and a Certified B CorpTM, driving the energy transition by making renewable energy more accessible and inclusive.
Job Description
Ostrom is looking for a Mid-level Backend Engineer to join their team. The role will involve designing and building backend solutions from scratch, participating in tech stack decisions, and helping develop a scalable platform for the renewable energy sector. The company offers a hybrid work model, relocation package, and a trust-based team culture.
Requirements
- 3+ years of backend development experience
- Strong experience with TypeScript
- Confident designing and building APIs
- Solid understanding of relational databases
- Commitment to writing clean, testable code (unit, integration, and E2E testing)
- Comfortable working on greenfield projects and building systems from the ground up
- Strong communication skills and fluency in English
- Familiarity with CI/CD workflows (e.g., Docker, GitHub Actions)
Benefits
- Monthly team events
- Discounted gym membership
- Public transport ticket
- E-bike or e-moped
- Futurebens or monthly vouchers
