Mid Level Full Stack Developer (React)
📍 Madrid, Spain | Hybrid (3 days in office)
About Ultrai
At 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 role
We’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 do
- Build high-quality frontend experiences with clean, minimal boilerplate code.
- Work mainly with JavaScript, TypeScript, 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 for
Native Spanish speaker or bilingual (Spanish / English) – clear communication is a must.Strong HTML / CSS fundamentals (we value clarity over framework-heavy experience).Proficiency in JavaScript, TypeScript, 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 LinkedIn!