It is a self-custodial crypto money app, bringing together wallets, stablecoins, banking rails and cards while customers control their keys and funds.
We are a small, product-minded team serving thousands of customers in more than 130 countries. You help decide how it works and take features from an idea to production. Your strengths may be in frontend or backend; your work reaches across both, including our React Native app.
With , customers can connect compatible AI agents to their account and use them to understand their finances, identify opportunities, and prepare payments or trades. This matters because it puts Tuyo at the center of a new way of managing money: customers get the convenience and intelligence of AI without giving up control.
Product engineering at Tuyo
Product engineers here own a customer problem and follow it through the stack. We work as fullstack as possible: shape the experience, build the interface, change backend logic, connect services, test and ship. We have a very high bar for product quality. We want people who care deeply about what they build: how it feels to use, how reliably it works, and whether it makes someone’s life better.
Bring depth in mobile,



frontend, backend or infrastructure, and curiosity about the rest. We invest heavily in AI tools and give engineers a very generous budget to use them. There’s a limit, but nobody’s found it yet.
Use AI to learn, build and test. Help the team become better at it by sharing workflows and improving our tools. Build across our React Native app, backend and integrations as the problem requires.
Care about security, reliability, performance and the details people notice.
Keep the codebase practical, improve how we work, and help set the engineering standard.
Engineering depth. Strong JavaScript/TypeScript and experience building production interfaces, APIs or backend systems. You can take an ambiguous problem, make sound tradeoffs, debug it and get it shipped.
You care about how something works and feels, and can explain your decisions.
You explore the edge of what AI makes possible, test new tools and approaches in real work, and share what you learn.
Clear communication. React Native or Expo is a bonus.
Employment: Full-time.

📌 Product Engineer (Full Stack) (Madrid)
🏢 Tuyo
📍 Madrid