(Senior) Full-Stack Software Engineer - Hybrid

Stack

Responsibilities

• ▹Develop and ship features in the React frontend and NestJS backend (built on Supabase/Postgres)
• ▹Work in a containerized environment (Docker)
• ▹Use AI coding tools daily (mainly Claude Code), with a focus on architecture
• ▹Proactively contribute ideas on product, architecture and processes
• ▹Work closely with the technical founder/CTO

Requirements

• ▹Technical/computer science degree with solid computer science fundamentals
• ▹3-5 years of software development experience
• ▹Full-stack: confident in both frontend and backend
• ▹Ability to quickly get up to speed on new technologies
• ▹Initial experience with machine-coding tools (e.g. Claude, Cursor, Codex)
• ▹Very good German skills
• ▹Good English skills

Soft skills

What we offer

• ▹Hybrid work in a modern office (U6 Platz der Luftbrücke) and home office
• ▹Hardware: MacBook Pro, 4K monitor
• ▹Inclusive work environment
• ▹Meaningful work on the energy transition
• ▹Close collaboration with the technical founder
• ▹Option to work from abroad, shared workations
• ▹At least 20 days of paid vacation plus up to 20 days of unpaid leave
• ▹Monthly budget for e.g. shopping vouchers, meal allowance, Deutschland-Ticket, childcare subsidy
• ▹Attractive and fair salary (€60,000-75,000 gross/year)
• ▹2 days/week home office, the whole of February is a remote month

About the company

20° GmbH is a Berlin startup founded by Leon Gebhardt (computer scientist) and Hannes Brockdorff (civil engineer), building digital infrastructure to decarbonize Europe's building stock — its 20° Förderservice gives trade businesses a tool to handle energy-subsidy processing for their customers.