Backend Engineer (Mid-Level)

About the Role

Join a core infrastructure team at an energy technology company building software for dynamic electricity plans. You will develop backend systems for billing, energy-market communications, and accounting, helping make these services reliable and scalable.

What You'll Do

• Design backend systems that address complex billing and energy-service requirements.
• Build and scale core services that support dynamic electricity plans and reliable billing.
• Develop and maintain backend data access and service logic.
• Contribute hands-on to production code and ship improvements with ownership.
• Help raise the quality and maintainability of core infrastructure.

What We're Looking For

• At least 3 years of experience building reliable backend infrastructure.
• Proficiency with TypeScript and Node.js, 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 concepts and scalable, maintainable service design.
• Experience integrating Stripe payments and billing flows.
• Strong computer science fundamentals through a degree or equivalent practical experience, plus evidence of exceptional technical work.
• Broad application-building experience and a hands-on record of recent production coding and shipping.
• Fluent German at C1 level or higher, with strong written and verbal communication skills.

Compensation & Benefits

Annual salary range: €80,000 to €120,000. Visa sponsorship is available.

Location

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