to apply, save this posting, or score it against your profile with AI.## About the roleOwn the end-to-end development of the React Native app, from UI and state management to API integration and App Store releases.

Aunque la experiencia profesional y las cualificaciones son fundamental para este puesto, asegúrese de comprobar si posee las habilidades interpersonales preferibles antes de solicitar, si se requieren.

Collaborate with founders to set engineering culture, architecture standards, and optimize performance across mobile and backend layers.## RequirementsRequires 5+ years of professional software engineering experience with a strong track record in React Native and TypeScript.

Candidates must possess a founder mindset and be based in or willing to relocate to Madrid or Miami.## BenefitsFounding-level EquityAI-tooling BudgetRelocation 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 TuyoWe 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 RoleAs 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 relea

📌 Senior Software Engineer (Madrid)
🏢 Jobcubby
📍 Madrid