backend developer in energy billing

Clera is an energy technology company building the operating system for the next generation of electricity supply in Europe. Its engineering team develops a modular billing engine, energy-market communication protocols, and an accounting ledger that power dynamic electricity plans for households and hardware manufacturers.

• Translate ambiguous business and regulatory requirements into clean, maintainable backend architecture;
• Own and evolve critical services supporting billing, ledger, and market communication systems;
• Ship quickly, make pragmatic trade-offs, and iterate in a fast-paced environment;
• Champion engineering best practices and participate actively in code review;
• Help grow the technical culture of a small, high-calibre team.

• Bachelor's degree in Computer Science or equivalent practical experience;
• 3–10+ Years of backend development experience;
• Strong proficiency in TypeScript (Node.js) and asynchronous programming patterns;
• Production experience with PostgreSQL and an ORM such as Drizzle for data access and schema management;
• Experience with Next.js, including API routes or server components used for backend services;
• Familiarity with distributed systems concepts and scalable, maintainable core services;
• Experience integrating Stripe payments and related billing flows;
• Strong written and verbal communication skills;
• Ownership mindset and ability to work effectively in a fast-paced, ambiguous environment;
• Willingness to work on-site in Berlin, Germany;
• Nice to have: workflow orchestration tools such as Temporal, experience in energy, fintech, or other regulated or billing-heavy domains, exposure to API-first or headless platform architecture.

• €80,000 – €120,000 Per year, depending on experience;
• Visa sponsorship is available for eligible candidates;
• Opportunity to join a small, high-impact team at an early stage and shape core technical decisions from the ground up.