Nancy K.

Need a React Native app that's stable, fast, and ready to scale, not a prototype that breaks under real users? I'm a React Native developer with a 99% Job Success Score and Top Rated Plus status on Upwork, working as a dedicated senior engineer, not a rotating agency team. You deal directly with me from kickoff to launch. $90K+ earned | 99% Job Success | Top Rated Plus | 2,100+ hours on Upwork I don't just build screens, I own the app experience end to end: UI, API integration, backend logic, performance, and deployment, so you're not coordinating between separate mobile, backend, and DevOps specialists. RECENT WORK: - Qbounce: AI-powered video analysis platform built in React Native, integrating AI processing with a smooth, responsive mobile UI - Social Commerce App: shopping + engagement platform combining product discovery, checkout, and user interaction features - Real-Time Parking App: live slot booking and payment system with real-time availability updates Earlier in my Upwork history: a 5-star, 1,000+ hour engagement building a custom travel assistance app, and a 5-star React Native ecommerce build, both with direct client endorsements for communication and reliability. WHAT I SPECIALIZE IN: - MVP to full-scale production apps - Converting Figma designs into pixel-accurate, production-ready builds - Performance optimization, faster load times, fewer crashes, smoother UI - REST / GraphQL API integration, including payments and real-time data - App Store & Google Play deployment - Long-term app maintenance and scaling TECH STACK: Mobile: React Native Front-end: React, Next.js, TypeScript, JavaScript Back-end: Node.js, Express, REST APIs, GraphQL Database: PostgreSQL, MongoDB Cloud & services: AWS, Firebase WHY CLIENTS STAY LONG-TERM: - Direct communication with the engineer actually writing your code: 0-4 hour average response time - Clean, scalable architecture from day one, not quick fixes that need a rebuild later - A track record of 5-star, long-duration engagements, not one-off gigs Tell me what you're building, I'll tell you honestly what it'll take to get it live and stable.