Alfonso Cartes, Senior React Native & Full-Stack TypeScript Engineer
Alfonso Cartes · Cyprus, EU

About · Senior React Native specialist

Senior React Native expertise, backed by full-stack product ownership.

I help teams architect, build, rescue, and ship mobile products—then handle the TypeScript systems, production decisions, and follow-through needed to make them work.

Available for contracts · Full US Eastern overlap · 9–5 ET

What I bring

One senior engineer across the mobile product.

01

React Native depth

Architecture, Expo, offline data, native integrations, performance, difficult upgrades, and store releases.

02

Full-stack delivery

The TypeScript applications, APIs, real-time systems, data models, and Cloudflare infrastructure behind the app.

03

Product judgment

Founder-level understanding of users, commercial tradeoffs, delivery risk, and what the software needs to achieve.

How I work

I own the path from architecture to production.

I'm a senior React Native and full-stack TypeScript engineer based in Cyprus (EU). I've spent 20+ years building web and mobile applications, with 6+ years focused on shipping cross-platform products with React Native and Expo.

React Native is where I spend most of my time. My work includes a solo-built 62-screen P2P marketplace, offline-first sales software, food ordering and payments, real-time features, and travel applications released through the App Store.

Clients work directly with me from product and architecture decisions through implementation, release, and production follow-through. The backend is part of that ownership: TypeScript APIs, Cloudflare Workers, D1, KV, Durable Objects, Workers AI, and the web systems around the app.

I use the user experience as the measure of success, covering performance, accessibility, Core Web Vitals, SEO, and the operational decisions required to keep a product dependable after launch.

Career foundation

Engineering depth with founder perspective.

I started as a freelance web developer in 2005, then worked at Dun & Bradstreet and Apple before moving into engineering leadership at startups and growing platforms. I hold a BSc and MSc in Computer Science from the Autonomous University of Madrid (UAM).

I also have 10+ years of experience in product, marketing, and business. I've founded and run three businesses and launched products in food manufacturing, international commerce, and software. That mix helps me understand users, commercial constraints, and the people building the product—judgment that matters even more in the AI era.

Have a project in mind?

Tell me what you're working on and where you need help.