Backend Engineer

ABOUT THE ROLE Join the core infrastructure team at an energy technology company building systems for dynamic electricity plans and reliable billing. You will develop scalable backend services, billing infrastructure, and market communication systems that support complex energy operations. WHAT YOU'LL DO - Design backend solutions that simplify billing and energy-market systems. - Scale core infrastructure to support growing transaction volumes and market demands. - Ship features and improvements through rapid iteration. - Raise technical standards through code reviews, architecture decisions, and mentorship. WHAT WE'RE LOOKING FOR - At least 3 years of hands-on backend development experience, with recent production coding and shipping work. - Proficiency in TypeScript and Node.js, including asynchronous programming. - Experience with PostgreSQL and ORM-based data access, such as Drizzle or similar tools. - Experience building Next.js backend services, including API routes or server components. - Familiarity with distributed systems and designing scalable, maintainable core services. - Experience integrating Stripe payments and billing workflows. - Strong computer science fundamentals through formal education or equivalent practical experience, plus evidence of exceptional technical ability through projects, research, competition results, or founding work. - Fluent or native-level German proficiency, at C1 or above. - Clear communication, an ownership mindset, and comfort working in a fast-paced, ambiguous environment. COMPENSATION & BENEFITS Base salary: €80,000 to €120,000 annually. Visa sponsorship is available. LOCATION On-site, five days per week in Berlin, Germany.