Product Engineer, Fullstack

As a Product Engineer at Tuyo, you build a self-custodial crypto money app that brings together wallets, stablecoins, banking rails and cards while customers control their keys and funds. You help decide how the product works and take features from idea to production, working across our React Native app, backend and integrations. Your work reaches both frontend and backend, and you own customer problems end to end.

What you'll do

• Own features end to end, working directly with the founders and design
• Build across our React Native app, backend and integrations as the problem requires
• Build tools and experiences for AI agents, with clear permissions and approval flows
• Make complex money flows feel simple, caring about security, reliability, performance and the details people notice
• Keep the codebase practical, improve how we work, and help set the engineering standard

What you bring

• Engineering depth: strong JavaScript/TypeScript and experience building production interfaces, APIs or backend systems, comfortable following a feature across the stack
• Ownership: you can take an ambiguous problem, make sound tradeoffs, debug it and get it shipped
• Product judgment and taste: you care about how something works and feels, and can explain your decisions
• AI in your daily work: you're hungry to keep learning and getting better, explore the edge of what AI makes possible, test new tools and approaches in real work, and share what you learn
• Clear communication: you explain tradeoffs, ask for help and make the people around you better

Nice to have

• Experience with wallets, stablecoins, onchain transactions or consumer products
• React Native or Expo

What we offer

• Annual salary of €60,000-€100,000
• Equity of 0.3%-0.5%
• Full-time position in Madrid, working together in person
• A very generous budget for AI tools

About Tuyo

Tuyo is a venture-backed self-custodial crypto money app serving thousands of customers in more than 130 countries. The company was founded by izqui9, who cofounded Aragon, and Aperez Paya, previously an executive at Allfunds.