Marharyta V.

A Senior React Native/Expo Developer & Software Architect with 9+ years of experience building high-quality mobile and full-stack applications — from MVPs to production systems used by thousands of users. I don’t just build apps — I design systems that are scalable, maintainable, and ready for growth. 🚀 What I specialise in: • ⚙️ Mobile architecture (React Native / Expo) — clean, scalable, production-ready • 🧠 Full-stack development — Node.js, PostgreSQL, Supabase, Firebase • 🌐 Web & admin panels — React, Next.js, dashboards, internal tools • 🤖 AI integrations — OpenAI, Claude, AI-powered features (recommendations, generation, automation) • 🔌 API integrations — payments (Stripe, RevenueCat), maps, analytics, third-party platforms • 📡 Real-time systems — chat, live updates, subscriptions, WebSockets • 🧪 Performance, debugging & stabilization — fixing complex apps, not just building from scratch • 👥 Tech leadership — leading teams, structuring projects, mentoring developers 📱 Experience: • 40+ mobile apps shipped (iOS & Android) • Built and scaled apps in: healthtech, fintech, social, marketplaces, AI products • Strong experience with existing codebase refactoring & stabilization • Led teams and delivered full-cycle development (architecture → release → scaling) 🛠 Tech Stack: Mobile: React Native (Expo & bare), TypeScript, Reanimated, React Navigation Backend & DB: Node.js, PostgreSQL, Supabase, Firebase (Auth, Firestore, Functions), REST, GraphQL Web: React, Next.js, admin dashboards, Vercel deployments AI & Integrations: OpenAI, Claude, AI workflows, OCR, recommendation systems Other: Stripe, RevenueCat, Mapbox, WebSockets, CI/CD (GitHub Actions, Bitrise), App Store & Google Play releases 💬 How I work I focus on: • clean architecture (so you don’t need to rebuild in 3 months) • fast iteration (MVPs in weeks, not months) • real product thinking (not just coding tickets) I’m comfortable: • owning the full product • jumping into messy codebases and fixing them • making technical decisions independently 🤝 Let’s work together If you need someone who can build, fix, scale, and actually think like a product engineer, I’d love to help. Let’s build something solid 🚀