Backend Engineer

ABOUT THE ROLE This is a core infrastructure role at a pre-seed energy technology company building the foundational systems that power dynamic electricity plans, billing, and energy-market integrations across Europe. You will work directly on a modular billing engine, low-level energy-market communication protocols, and a full accounting ledger, helping design and scale systems that need to be both highly reliable and deeply extensible. WHAT YOU'LL DO - Design systems that tame complexity, making hard infrastructure problems approachable and maintainable at scale. - Scale core backend services to handle the demands of a growing energy platform serving OEMs, installers, and end consumers. - Ship production code consistently, taking full ownership from design through deployment. - Raise engineering standards across the team through code review, architecture decisions, and a high personal bar for quality. WHAT WE'RE LOOKING FOR - At least 3 years of hands-on experience building and shipping reliable backend infrastructure in production environments. - Proficiency in TypeScript and Node.js, with a strong understanding of asynchronous programming patterns. - Experience with PostgreSQL and ORM-based data access (Drizzle or similar). - Experience building backend services with Next.js, including API routes or server components. - Familiarity with distributed systems concepts and an instinct for designing scalable, maintainable services. - Experience integrating payment systems such as Stripe and handling complex billing flows. - Strong computer science fundamentals, whether through a formal degree or equivalent practical experience. - A track record of technical exceptionality, demonstrated through standout projects, competitive programming, research, founding work, or a comparable signal. - Broad application-building experience rather than a narrow specialization in data pipelines, AI infrastructure, or similar niches. - Strong written and verbal communication, with a clear ownership mindset and comfort operating in a fast-moving, ambiguous environment. COMPENSATION & BENEFITS - Salary: 80,000 to 120,000 EUR annually - Visa sponsorship: available LOCATION On-site in Berlin, Germany, five days per week. Remote work is not available for this role.