Backend Engineer

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.

• 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.

On-site in Berlin, Germany, five days per week.

• 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.

Base salary: €80,000 to €120,000 annually. Visa sponsorship is available.