Design Engineer (m/w/d)

ABOUT BUENA Buena is building the technology that real estate runs on. We're making every part of real estate – from finding and financing to buying and managing – as seamless and transparent as possible. We do this by acquiring property managers across Germany and rebuilding them as technology companies. In under two years and with fewer than 25 people at HQ, we've already become Germany's second-largest property manager. The next trillion dollar company in real estate won't sell software. It will run the industry. WHAT THIS ROLE ACTUALLY IS This isn't a frontend engineer with a design title, and it isn't a designer who prototypes and throws it over the wall. The value is in one head holding both. When you understand what the data model can do, the design gets simpler; when you've designed the interaction, you know what the backend actually needs. Property management is a mess of real-world workflows: accounting, owner communication, maintenance, contracts - and untangling them takes someone who can move between the interface and the system underneath in the same afternoon. AI has raised the floor: anyone can generate a passable screen now. Your job is the ceiling - the taste, judgment, and interaction craft it can't produce. You'll prototype fast and put real screens in front of property managers early, because a prototype convincing enough to use is how we kill weak ideas and back the right ones. RESPONSIBILITIES: - Designing, building, and shipping product UI end-to-end, from early ideas to rollout and iteration. - Owning the visual and interaction quality of the product: spacing, typography, motion, hierarchy, and setting the bar for how Buena looks and feels. - Translating dense operational workflows (accounting, contracts, maintenance, owner communication) into simple, reliable, AI-enabled interfaces - Building in code. You prototype fast, put real screens in front of property managers, and let feedback drive the next iteration. - Help us shape design and fro