pul lipbLocation: /b Madrid, Spain (Slightly Preferred) or Miami, FL — 100% In-Person (Daily in-office, ~25% adaptable remote days). /p /li lipbCompany Size: /b Early stage (3 full-time engineers). /p /li lipbMission: /b Global, non-custodial web3 banking app with a flawless mainstream UX. /p /li /ul h3About Tuyo /h3 pWe 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. /p ul lipbThe Traction: /b $5M Seed round from top US/EU investors. Operating in 130+ countries with a viral Visa debit card product. /p /li lipbThe Founders: /b Jorge Izquierdo (co-founder of Aragon, built core Ethereum infrastructure holding $30B+) and Alejandro Perezpayá (ex-Allfunds, $1.5T AUM bank). /p /li /ul h3The Role /h3 pAs 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. /p pbKey Responsibilities: /b /p ul liOwn features end-to-end: from UI and state management to API integration, testing, and App Store releases. /li liWrite clean, reliable TypeScript/JavaScript that scales.



/li liWork directly with founders and designers; move fast from concept to production without waiting for perfect specs. /li liDebug tricky performance issues across iOS, Android, and backend layers. /li liHelp set early engineering culture, architecture standards, and tooling. /li /ul h3Requirements /h3 ul lib5+ years /b of professional software engineering experience. /li libStrong track record /b of shipping and optimizing production apps in bReact Native /b. /li liDeep proficiency in bTypeScript / JavaScript /b. /li libFounder Mindset: /b High agency, extreme ownership, low ego. You care about product taste and user experience. /li libIn-Person: /b Based in (or willing to relocate to) Madrid or Miami. /li /ul pbNice-to-Haves: /b /p ul liExperience with Expo, native modules, and mobile CI/CD. /li liBackend / Full-stack experience (Node.js, APIs). /li liCrypto/EVM familiarity (a plus, but genuine interest is enough). /li liHeavy use of AI tooling to multiply your engineering output. /li /ul h3What We Offer /h3 ul liHigh-tier base salary + meaningful founding-level equity (0.3%–0.6%). /li liLarge individual AI-tooling budget. /li liRelocation support for non-local candidates. /li /ul /p #J-18808-Ljbffr

📌 Senior Software Engineer (React Native) (Madrid)
🏢 OnHires
📍 Madrid