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 that support energy-market communication, billing, and accounting. What You'll Do Design backend solutions that simplify complex billing and energy-market workflows. Scale core infrastructure to support growing transaction volumes and market demands. Ship features and improvements through rapid, iterative development. Raise engineering standards through code reviews, architecture decisions, and mentorship. What We're Looking For At least 3 years of hands-on backend engineering experience, including recent production code shipping. Strong TypeScript and Node.js skills, including asynchronous programming. Experience with PostgreSQL and ORM-based data access. Experience building backend services with Next.js, including API routes or server components. Familiarity with distributed systems and designing scalable, maintainable core services. Experience integrating payment and billing workflows, ideally with Stripe. Strong computer science fundamentals through formal education or equivalent experience. Evidence of exceptional technical ability through standout projects, research, competition results, founding work, or comparable experience. Fluent or native-level German proficiency (C1 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.