Jay P.

I build and scale production-ready web and mobile applications using React.js, Next.js, React Native, Expo, TypeScript, Supabase, and modern AI tools. With 9+ years of React.js/Next.js experience and 8+ years of React Native/Expo experience, I've worked on complex products used by millions of users, from high-traffic consumer apps and SaaS platforms to fintech/insurtech, e-commerce, booking, and enterprise applications. ⭐ Top Rated Plus | Top 3% on Upwork | 100% Job Success | 20+ React projects | 5-star client history 💻 What I can build for you 💻 Web Applications • React.js/Next.js applications • SaaS platforms, dashboards & admin panels • High-performance, SEO-friendly websites • SSR/SSG/ISR architecture • REST & GraphQL API integrations • Real-time applications with WebSockets / SocketIO • Supabase authentication, database & application integrations • Pixel-perfect responsive interfaces from Figma 📱 Mobile Applications • React Native / Expo applications for iOS & Android • Expo / EAS builds and deployments • Existing app modernization, debugging & performance optimization • Push notifications, deep linking, analytics, and third-party integrations • Offline-first and data synchronization solutions • Native functionality and integrations when required 🤖 AI-Powered Applications & AI-Assisted Development • AI feature and API integrations • OpenAI / ChatGPT, Claude and other AI integrations • AI-powered workflows and product features • AI-assisted coding with Cursor, GitHub Copilot, and ChatGPT • Faster development, debugging, refactoring, and testing while keeping engineering decisions and code quality under human control 🛠️ Core Technology Stack • Frontend: React.js, Next.js, TypeScript, JavaScript, Redux, Redux Toolkit, Zustand, TanStack Query, GraphQL • Mobile: React Native, Expo, EAS, React Navigation, native integrations • Backend / Data: Supabase, PostgreSQL, REST APIs, GraphQL, Firebase • UI: Tailwind CSS, shadcn/ui, Material UI, Sass, responsive & pixel-perfect Figma implementation • Testing: Jest, React Testing Library, Cypress, Playwright, Detox Real-time: WebSockets, SocketIO • AI: OpenAI / ChatGPT, Claude, GitHub Copilot, Cursor, and AI-assisted development workflows • Deployment: Vercel, Expo EAS, CI/CD, GitHub Actions 🤝 What You Can Expect From Me ✔ Senior-level ownership rather than just completing tickets ✔ Clean, maintainable and scalable code ✔ Strong attention to UI quality, performance and edge cases ✔ Clear communication and proactive problem-solving ✔ Ability to work independently inside an existing codebase ✔ Product-minded thinking — not just "write the code and move on" ✔ Long-term partnership and ownership of features from development through production f you're looking for a Senior React.js / Next.js or React Native / Expo developer who can take ownership of your product and deliver production-quality work, send me a message or invite me to your project. I'd be happy to review your requirements, existing codebase, Figma designs, or product idea and discuss the best technical approach.