Fullstack Engineer (Services) (all genders)

• Build and ship end-to-end service workflows
• Expand our service offering into new European markets, adapting to local regulations and requirements
• Ship polished React UIs and interaction-heavy workflows with strong UX
• Integrate AI models (Anthropic, OpenAI) to automate service fulfilment like document generation, form pre-filling, validation
• Build APIs that connect service data across systems and workflows
• Partner closely with Design and Product to deliver features at speed The technologies you will use include:

• TypeScript, React, Three.js
• Go, Node/NestJS, Postgres
• Electric SQL, RxDB, local-first sync patterns
• Docker, Fly.io, NATS

What you bring

• 2-4 years for Mid-level or 5+ years for Senior of professional software experience
• Strong React + TypeScript and UX craftsmanship
• Backend experience with APIs, data modelling, and SQL databases
• Comfortable shipping Fullstack features end-to-end
• Already using AI tools (Claude, Cursor, Copilot) in your daily workflow, not just experimenting
• Berlin-based, hybrid 3 days in the office (Mitte)
• Fluent in English (German is a plus)

We offer

This is a Fullstack role with a 70/30 split between Frontend and Backend.

What we offer

• Grow with us: As part of a fast-growing, YC-backed climate tech startup with an ambitious team.
• Real ownership: Drive your work from idea to impact.
• Low ego, high trust: No blame, open feedback, collaboration over hierarchy.
• Be part of the energy transition: Help bring more heat pumps and solar to homes every day.
• Hybrid work in Berlin-Mitte: 3 days together in our office near Weinbergspark, 2 from home. Need more flexibility? We'll find a way.
• Modern equipment: MacBook and 27″ monitor.
• Annual team retreat plus regular team events.
• Mobility: Dance e-bike or Deutschland-Ticket.
• Fitness: Urban Sports Club membership.