Senior Software Engineer (React Native)

Jobcubby; Madrid; Presencial; EUR 90.000 - 120.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Founding-level Equity

AI-tooling Budget

Relocation Support

Descripción de la vacante

Tuyo in Madrid (Spain) or Miami, FL seeks a founding-level React Native engineer to own the app end-to-end, from UI to App Store releases, and optimize performance across mobile and backend layers.

You will work directly with the founders to set engineering culture, architecture standards, and rapidly ship features with high-quality UX. 5+ years in React Native with TypeScript is required; relocation is supported and in-person presence is expected.

Formación

• 5+ years of professional software engineering experience.
• Strong track record shipping and optimizing production apps in React Native.
• Deep proficiency in TypeScript/JavaScript.
• Founder Mindset: high agency and ownership.
• In-Person: based in Madrid or able to relocate to Madrid or Miami.

Responsabilidades

• 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.
• Collaborate with founders and designers to move from concept to production quickly.
• Debug performance issues across iOS, Android, and backend layers.
• Help set early engineering culture, architecture standards, and tooling.

Conocimientos

React Native

TypeScript

JavaScript

Mobile app development

Expo

CI/CD

Node.js

API integration

AI tooling

Herramientas

Expo

Native modules

CI/CD

Node.js

APIs

Descripción del empleo

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 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 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.