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# Senior Software Engineer (React Native)

- **Company:** Jobcubby
- **Location:** Madrid, Spain
- **Contract:** Permanent contract
- **Skills:** App Store (IOS), Software Engineering, TypeScript, Backend, Web3.js, React Native
- **Published:** September 7, 2026
- **Apply:** https://www.buscojobs.com.es/senior-software-engineer-react-native-en-madrid-ID-369770057

## About the Role

## 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.
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.

## Description

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.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


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