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.