Senior Software Engineer (m/f/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. We’re hiring a core addition to our engineering team to rebuild an industry stuck in the early 2000s. You’ll work closely with our founders, head of product, and design team in Berlin. RESPONSIBILITIES: - Designing, building, and shipping product features end-to-end, from early ideas to rollout and iteration. - Taking ownership of parts of the product and contributing to architectural decisions that shape how our systems evolve. - Improve performance and reliability across our core systems. - Collaborating closely with product and design to translate real-world operational workflows into simple, reliable, AI-enabled software - Help us shape engineering culture as we grow, be it Engineering Practices, Technical Standards or workflow optimisations. YOU MAY BE A GOOD FIT IF YOU: - You have shipped and operated production web applications end-to-end, and are comfortable owning features from idea through deployment and iteration. - You are proficient in TypeScript and have strong experience with React and Node.js (or comparable modern full-stack environments). - You are able to independently design, build, and deliver features with minimal guidance, including making pragmatic product and technical decisions. - You understand how modern web systems work in practice, including APIs, frontend state management and backend architecture. - You take ownership seriously: you care about outcomes, move quickly, and are comfortable making decisions in ambiguous situatio