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!
Stack Engineer • Madrid, Kingdom Of Spain, España