Vitalii M.

I build fast, polished cross-platform mobile apps in React Native & Expo — from architecture to the App Store & Google Play. If you need an iOS + Android app that ships on time and feels native, I can take it end-to-end. 👋 I'm Vitalii, a React / React Native Engineer with 7+ years of experience turning product ideas into production apps used by real customers. Master's in Computer Science, Lviv Polytechnic University. 🔸 What I do best Cross-platform mobile apps with React Native (Expo & CLI), TypeScript Web front-ends with React & NextJS (PWA, HTML5, CSS/SCSS, Tailwind) State management: Redux Toolkit / RTK Query, Redux Saga & Thunk, Zustand, TanStack Query, MobX, Zod Real-time features with WebSockets / Socket IO In-App Purchases & subscriptions (iOS/Android), Stripe, IapHub Push notifications, social auth (Apple / Google / Facebook), analytics (AppsFlyer, Firebase, Meta SDK) Testing with Jest & Cypress; clean, maintainable, well-architected code Comfortable across the stack when needed: NodeJS, Express, Firebase, Supabase, Google Cloud, AWS 🔸 Apps I've shipped to production CompanAIn — AI Pet Health (React Native, Expo, TypeScript, Redux Toolkit) — built solo: real-time AI chat, health-record timeline, tiered subscriptions + Stripe enterprise checkout, push & analytics. Live on the App Store & Google Play. Babee — Baby Tracker & Digital Baby Book — built from scratch to release: activity tracking (feeding, sleep, milestones) with a living timeline. Live on the App Store. CouchBeauty — healthcare app — social auth (Google/Apple/Facebook) + Stripe payments. Live on the App Store. 🔸 Why clients keep me around I take ownership — I think about the product, not just the ticket Clear, proactive communication — no surprises, no missed deadlines Reliable delivery from first commit to store release 📩 Tell me what you're building — send a short note about your project and I'll reply with how I'd approach it and a realistic timeline.