Full stack engineer

Mid Level Full Stack Developer (React) Madrid, Spain | Hybrid (3 days in office)About UltraiAt Ultrai, we’re building the next generation of financial AI. Our mission is to empower financial institutions with precise, real-time insights through cutting-edge quant models. Backed by a financial institution and trusted by 5,000+ users, we’re in an exciting exploration phase creating portfolio meta-analysis tools with LLM-powered analysis and intuitive chatbot interfaces.The roleWe’re looking for a mid level full stack developer (with a frontend focus) to join our lean tech team of 4. This is a hands-on role where you’ll help build new features from scratch, contribute to architectural choices, and grow your skills in a fast-moving AI fintech environment.What you’ll doBuild high-quality frontend experiences with clean, minimal boilerplate code.Work mainly with Java Script, Type Script, and Python.Build from scratch the frontend component, with React.Take ownership of your work and contribute ideas to framework and library choices.Code ~32 hours per week with minimal meetings – focus on building.What we’re looking forNative Spanish speaker or bilingual (Spanish / English) – clear communication is a must.Strong HTML / CSS fundamentals (we value clarity over framework-heavy experience).Proficiency in Java Script, Type Script, and Python.Basic Docker knowledge.Experience building projects from scratch and selecting appropriate libraries.Bonus : any experience or interest in Gleam / Elixir (we’re migrating our stack!).Why Ultrai?Small, tight-knit team where your voice matters.Adult-friendly culture, we trust you to manage your own time.Be part of a fast-paced innovation space at the intersection of AI and finance.Learn directly from finance experts with deep domain experience.Free office meals and a prime Madrid city center (Serrano) location.A role with direct impact on product development during our growth phase. Ready to kick-start your career in fintech innovation? Apply now via Linked In!