Senior Software Engineer — AI‑Driven Full‑Stack Impact

Taxfix, Madrid-based, is seeking a senior software engineer to build core features for our flagship product. You’ll own end‑to‑end delivery in a cross‑functional team, turning complex tax scenarios into reliable experiences with an AI‑first approach. You’ll contribute across frontend and backend with React and Node.js, collaborate with product, design and security, and help raise the bar for scalable design, quality and maintainability. J-18808-Ljbffr