About the Role Join an early-stage AI and construction technology team building a new BIM authoring tool designed for AI agents. You will help shape its geometry foundation and enable agents to plan and edit real building models. What You'll Do • Build the geometry and data core of a new BIM authoring tool. • Develop agents that can plan and edit building models. • Create generative design capabilities that account for building codes and client constraints. What We're Looking For • Experience shipping production software, with one to two years considered for candidates who have built substantial projects independently over several years. • Hands-on experience with 3D geometry or CAD, such as geometry kernels, B-rep or mesh systems, CAD APIs, IFC, or Revit. • Daily engineering use of LLMs and AI agents, with experience building production AI features. • A broad engineering skill set, comfort working across the stack, and the ability to become productive in unfamiliar areas. • Startup or founder experience and fluency in English. • Experience with Python, PyTorch, TypeScript, three.js, AEC or BIM workflows, generative or multimodal models, or technical leadership is useful. Compensation & Benefits Stock options are available. Visa sponsorship is not available; applicants must be authorized to work in the EU, UK, or Switzerland without sponsorship. Location Remote from Europe, including the UK and Switzerland. Primary location: Karlsruhe, Germany.