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.