About the Role Join an early-stage team building AI-first software for architecture and construction. As a founding engineer, you will help create a new BIM authoring tool designed for AI agents, with the opportunity to grow into a technical leadership role. What You'll Do • Build the geometry and data core of a new BIM authoring tool. • Develop AI agents that can plan and edit real building models. • Create generative design capabilities that account for building codes and client constraints. What We're Looking For • Experience shipping production software; one to two years may be suitable if paired with substantial personal projects. • Hands-on experience with 3D geometry or CAD, such as geometry kernels, B-rep or mesh modeling, CAD APIs, or IFC. • Regular, practical experience building with LLMs and AI agents. • A generalist mindset, with the ability to work across the stack and get productive quickly in unfamiliar areas. • Startup or founder experience, strong English fluency, and a willingness to work in an early-stage environment. • Experience leading engineers or making architecture decisions is valuable, as is AEC or BIM domain knowledge. • Useful technologies include Python, PyTorch, TypeScript, and three.js, as well as generative or multimodal models for 3D or visual data. Compensation & Benefits Stock options are available. Visa sponsorship is not available; candidates must already be authorized to work in the EU, UK, or Switzerland. Location Remote from Europe, including Switzerland and the UK. The primary location is Karlsruhe, Baden-Württemberg, Germany. Candidates should be based in Europe or willing to relocate there.