Backend Engineer

Summary

Join Ostrom, Europe’s leading energy management platform, as a Backend Engineer and contribute to building a scalable platform for the renewable energy sector. You will design and build backend solutions, participate in tech stack decisions, integrate new product lines, and work on projects related to new business and operational efficiency. The team comprises sixteen people, twelve engineers, and four in Product. Ostrom offers a hybrid work model, relocation package, and various benefits including an annual growth budget, company shares, and flexible extras like gym memberships and transportation options. The company fosters a transparent and collaborative culture with opportunities for personal and professional growth. Ostrom is committed to environmental sustainability, with each customer helping offset 1.5 tons of CO2 emissions annually.

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

Responsibilities

• Design and build backend solutions from scratch
• Take part in tech stack decisions—choosing the best tools, frameworks, and processes for the team
• Help develop a scalable platform for the renewable energy sector using modern technologies
• Integrate new product lines like smart meters, dynamic pricing, EV charging, and more

Preferred Qualifications

• Experience with AWS services (ECS, RDS (Aurora), S3, CloudWatch, Lambda)
• Familiarity with CI/CD workflows (e.g., Docker, GitHub Actions)
• Experience with React or React Native, or willingness to learn new technologies and take on full-stack tasks when needed
• Experience using AI tools (e.g., for debugging, documentation, testing)—we value developers who integrate AI into their daily workflow to boost productivity, but also have a practical mindset — we’re not into vibe coding. We appreciate thoughtful engineering and clear thinking

Benefits

• We offer a hybrid work model with a dog-friendly office in Berlin, Mitte, in case you prefer working in the office
• Relocation package: If you want to move to Germany, we offer a visa and relocation support
• Personal development: You receive an annual growth budget, encompassed with frequent development 1:1’s and development cycles held twice a year
• Benefits: From monthly team events to discounted gym membership, ticket for public transport, e-Moped or e-Bike via Dance, Futurebens, and monthly vouchers
• 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
• VSOP: On top of offering a competitive salary you will have access to company shares to ensure you can truly be part of the journey
• Relocation package : We won't let distance get in the way, we offer visa and relocation support
• Trust-based Team : A truly flat hierarchy and transparent company culture, where everyone’s voice matters
• Benefits : An annual learning budget, company-pension scheme, company events, discounted gym membership, public transport ticket, e-bike or e-moped, Futurebens or monthly vouchers - the choice is yours