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, including a modular billing engine, market communication systems, and an accounting ledger. What You'll Do Design backend solutions that simplify complex billing and energy-market systems. Scale core infrastructure to support growing transaction volumes and market needs. Ship features and improvements through rapid iteration and practical execution. Improve technical quality through code reviews, architecture decisions, and mentorship. What We're Looking For At least 3 years of hands-on backend engineering experience, with recent production coding and shipping. 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 from formal education or equivalent practical experience, and evidence of exceptional technical work through projects, research, competition results, or founding experience. Fluency in German at C1 level or higher, strong communication skills, and an ownership mindset. Compensation & Benefits Base salary: €80,000 to €120,000 annually. Visa sponsorship is available. Location On-site in Berlin, Germany, five days per week.