(Senior) Full-Stack Software Engineer (m/w/d)

Das ist der Job

Product-minded and comfortable owning an under-documented, reverse-engineered problem space.

Darum lohnt es sich

We're looking for someone who works the same way. - Small and ambitious team, high ownership, a genuinely hard problem and a rare chance to do serious work at the pace AI-assisted development makes possible. - We're already an AI-first team: the tooling, conventions, and dense in-code documentation are built around that workflow, so you'll be productive in a deep domain far faster than the domain would normally allow.

We offer a competitive compensation package including a base salary, bonuses for reaching product milestones, equity (VSOPs), tax benefits and public transport. last updated 28 week of 2026 Salary: 60.000 - 65.000 € per year 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. Responsibilities: 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.

Technologies: 3D AI API BIM Backend Claude Code Computer Vision GIS Support NestJS PostgreSQL REST React SQL TypeScript WebGL Windows UX UI Design NodeJS JavaScript ThreeJS opencv Fullstack More: Buildings account for 35% of green house gas emissions in the EU.

To accelerate the transition down to zero, we build browser-based SaaS for the German building-energy-renovation market.

Our product pulls a real building from cadastral LOD2 data, floor plans and facade photos, reconstructs it as a clean, editable 3D model in the browser, and exports it to industry formats for downstream energy calculations and grant applications.

It's a technically deep product: a versioned, real-time-capable, multi-user 3D building editor backed by a purpose-built geometry and computer vision engine. Much of the hardest code was and will be produced with agentic AI tooling under close human direction and review.