Backend Engineer

ABOUT THE ROLE Join a pre-seed-funded energy tech startup that is building the operating system for the next generation of energy. The core infrastructure team is developing a modular billing engine, low-level energy-market communication protocols, and a full accounting ledger — enabling dynamic electricity plans and reliable billing for hardware OEMs, installers, and energy providers across Europe. As a Backend Engineer, you will help shape scalable, maintainable systems at the heart of this platform. WHAT YOU'LL DO - Solve complex infrastructure and domain challenges through thoughtful system design. - Scale core backend services to support growing energy platform workloads. - Move quickly and take ownership — bias for action in a fast-paced, ambiguous environment. - Raise the engineering bar through code quality, architecture decisions, and collaborative standards. - Build and maintain API routes and server-side services using TypeScript (Node.js) and Next.js. - Work with PostgreSQL and Drizzle ORM for reliable, performant data access. - Integrate and extend Stripe-based billing and payment flows. WHAT WE'RE LOOKING FOR - Required: Proficiency in backend development using TypeScript (Node.js) with a strong grasp of asynchronous programming. - Required: Experience with PostgreSQL and at least one ORM (Drizzle preferred) for data access. - Required: Experience with Next.js, including API routes or server components used for backend services. - Required: Familiarity with distributed systems concepts and designing scalable, maintainable core services. - Required: C1+ professional language proficiency (English). - Experience integrating Stripe payments and related billing flows. - Strong written and verbal communication with an ownership mindset. - Strong CS fundamentals — formal degree or equivalent practical experience (3–10+ years of relevant backend experience). TECH STACK - TypeScript, Node.js, Next.js - PostgreSQL, Drizzle ORM - Temporal, Hono, Stripe - Tailwind (front-end context) COMPENSATION & BENEFITS - Salary range: $80,000 – $120,000 USD annually - Visa sponsorship available LOCATION This is an on-site role based in Berlin, Germany. Candidates must be able to work from the Berlin office.