To apply, save this posting, or score it against your profile with AI.## About the role Own the end-to-end development of the React Native app, from UI and state management to API integration and App Store releases. Collaborate with founders to set engineering culture, architecture standards, and optimize performance across mobile and backend layers.## Requirements Requires 5+ years of professional software engineering experience with a strong track record in React Native and Type Script. Candidates must possess a founder mindset and be based in or willing to relocate to Madrid or Miami.## Benefits Founding-level Equity AI-tooling Budget Relocation Support## Full description* 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 integral, non-custodial app that works like a bank account inside your phone,



removing all the complexity of crypto for the end user.* The Traction: $5 M 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 $30 B+) and Alejandro Perezpayá (ex-Allfunds, $1.5 T 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 Type Script/Java Script that scales.* Work directly with founders and designers; move fast from concept to production without waiting for perfect specs.* Debug tricky

📌 Senior Software Engineer (Madrid)
🏢 Jobcubby
📍 Madrid