About this role
- Location: Madrid, Spain (Slightly Preferred) or Miami, FL — 100% In-Person (Daily in-office, ~25% flexible remote days).
- Company Size: Early stage (3 full-time engineers).
- Mission: Global, non-custodial web3 banking app with a flawless mainstream UX.
ABOUT TUYO
We are building a global, non-custodial app that works like a bank account inside your phone, removing all the complexity of crypto for the end user.
- The Traction: $5M Seed round from top US/EU investors. Operating in 130+ countries with a viral Visa debit card product.
- The Founders: Jorge Izquierdo (co-founder of Aragon, built core Ethereum infrastructure holding $30B+) and Alejandro Perezpayá (ex-Allfunds, $1.5T AUM bank).
THE ROLE
As one of our first founding-level engineering hires, you will own major parts of Tuyo’s React Native app end-to-end. We run a shared-ownership model across the whole stack—mobile is your entry point, not a boundary. We deeply care about product feel, animations, and delighting users.
Key Responsibilities:
- Own features end-to-end: from UI and state management to API integration, testing, and App Store releases.
- Write clean, reliable TypeScript/JavaScript that scales.
- Work directly with founders and designers; move fast from concept to production without waiting for perfect specs.
- Debug tricky performance issues across iOS, Android, and backend layers.
- Help set early engineering culture, architecture standards, and tooling.
🎯 REQUIREMENTS
- 5+ years of professional software engineering experience.
- Strong track record of shipping and optimizing production apps in React Native.
- Deep proficiency in TypeScript / JavaScript.
- Founder Mindset: High agency, extreme ownership, low ego. You care about product taste and user experience.
- In-Person: Based in (or willing to relocate to) Madrid or Miami.
Nice-to-Haves:
- Experience with Expo, native modules, and mobile CI/CD.
- Backend / Full-stack experience (Node.js, APIs).
- Crypto/EVM familiarity (a plus, but genuine interest is enough).
- Heavy use of AI tooling to multiply your engineering output.
📦 WHAT WE OFFER
- High-tier base salary + meaningful founding-level equity (0.3%–0.6%).
- Large individual AI-tooling budget.
- Relocation support for non-local candidates.
Tech stack
ReactTypeScriptJavaScriptNode.js