Backend Engineer (Mid-Level)
About the Role
Join the core infrastructure team at an early-stage energy technology company, building the backend systems behind dynamic electricity plans and reliable billing. You will help develop scalable services for billing and energy-market communication.
What You'll Do
Design backend systems that reduce complexity in billing and energy-market workflows.
Scale core infrastructure to support growing transaction volumes and market demands.
Ship features and improvements through rapid iteration and practical engineering decisions.
Raise technical standards through code reviews, architecture decisions, and mentorship.
What We're Looking For
At least 3 years of hands-on experience building and shipping reliable backend systems in production.
Strong TypeScript and Node.js skills, including asynchronous programming.
Experience with PostgreSQL and ORM-based data access, such as Drizzle or similar tools.
Experience building Next.js backend services, including API routes or server components.
Familiarity with distributed systems and designing scalable, maintainable services.
Experience integrating Stripe payments and billing workflows.
Strong computer science fundamentals through formal education or equivalent practical experience.
Fluent or native-level German proficiency, C1 or higher.
Interest in early-stage environments, an ownership mindset, and evidence of strong technical ability through projects, research, competition, or founding work.
Broad application-building experience and clear written and verbal communication skills.
Compensation & Benefits
Annual salary of €80,000 to €120,000. Visa sponsorship is available.
Location
On-site in Berlin, Germany, five days per week.