(Senior) Full-Stack Software Engineer (m/w/d)
Salary: 60000 - 65000 EUR per year.
Category: JavaScript Developer / Engineer
Location address: Methfesselstr. 43, Berlin, Germany.
At 20° GmbH we are looking for a JavaScript engineer! Our tech stack:
- Claude Code
- ThreeJS
- NestJS
- React
- TypeScript
- PostgreSQL
- opencv
- WebGL
Requirements:
- High quality standards: while moving fast, you still care deeply about code quality and architectural soundness of the product.
- Fluency with AI-assisted / agentic development: hands-on experience driving tools like Claude Code to build real, non-trivial features, plus the discipline to review and verify their output rigorously.
- Strong 3D graphics engineering with Three.js / WebGL: scene, camera & projection math, raycasting/picking, mesh/BufferGeometry processing, render-loop performance.
- Fluency in React + TypeScript
- Backend competence in Node/TypeScript + relational SQL: NestJS or similar, PostgreSQL, transactions, concurrency.
- Mathematical & geometric literacy: enough to understand theoretical concepts, read algorithmic code and research papers.
- Product-mindful and comfortable owning an under-documented, reverse-engineered problem space.
Your responsibilities are:
- Extend the 3D/CAD editor: new element types (windows/openings, rooms, zones, HVAC), multi-storey support, richer editing tools.
- Build out real-time multi-user collaboration.
- Improve and verify the geometry engine and the IFC / CAD exporters: reconstruction quality, normalization, export fidelity.
- Own features across the full slice: Postgres schema → NestJS domain → REST/WS API → React/Three.js UI.
Compensation package:
- Base salary: 60000 - 65000 EUR per year.
- Bonuses for reaching product milestones.
- Equity (VSOPs).
- Tax benefits.
- Public transport.
last updated 35 week of 2026
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