Hire the Best React Native Developers in California

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 🚀

I am an expert mobile app developer in the top 1% of contractors on Upwork. Using React Native, I create well-designed, beautiful cross-platform mobile apps. I love React Native and have been using it to develop a variety of apps for clients ever since it came out. I am a computer science graduate from Azusa Pacific University, and won the hackathon there for one of the apps I made with React Native in under 72 hours. I am easygoing and enjoy working on interesting projects on the cutting edge of technology. I like working with other people, trying to bring their vision for apps to come to life. My most common workflow is Trello, Slack, Github, VSCode, Powershell, Expo, React Native, Firebase. I post daily updates on my progress, as well as over-the-air updates so that you can physically see on your device the progress being made. I always write out clear proposals before committing to working on a project. My code is almost always re-usable, which allows me to make new apps much quicker. At this point I basically have my own library of components to build with. React Native itself allows modular code reuse which helps with this. I've built apps from scratch for clients lots of times, and each time I get better at it. I can give accurate estimates and recommendations because of this. There's also some neat coding tricks I've picked up along the way. I am very flexible with time schedules, app requirements, and so on. The way I'm able to do this is by preferring firm-fixed price, and by starting with the smallest possible version. I enjoy making apps, so if you have an app idea and want it made, let me know and I'll do my best to help get it made. Whether that means me giving recommendations on how you can build it yourself, or me guiding a more junior developer I put you in contact with, or I end up giving a free consultation, I'd love to hear about your app and see if I can help.

Hello from sunny ☀️ Hollywood, CA — I’m Nik, a Full-Stack Developer and Product Designer helping startup founders turn ideas into shippable, scalable SaaS products. I combine product design, UX strategy, and full-stack development to build MVPs fast, without cutting corners that slow you down later. I’ve worked on products connected to Nike, Boeing, and UnitedHealthcare, and bring over 10 years of UX experience designing accessible, WCAG-compliant digital products for SaaS platforms, mobile apps, and internal tools. How I help SaaS founders MVP to launch Rapid MVP development with clean architecture Design, build, iterate, and ship fast Foundations that scale beyond version one Product design and UX Product thinking, user flows, and wireframes Figma and Framer prototypes UX decisions tied to conversion and retention Full-stack development React.js, Next.js, Node.js, MERN stack APIs, authentication, dashboards, and admin panels Secure, maintainable, production-ready code iOS and app development Expo and React Native apps App Store–ready MVPs Polished UI with strong performance Why founders work with me Design and engineering in one partner Clear communication and fast execution Strong product instincts, not just code Clean, scalable codebases US-based, founder-friendly collaboration Great fit if you’re building SaaS platforms Startup MVPs Internal tools and dashboards Mobile apps for iOS and Expo Product redesigns or rebuilds Keywords for Upwork search Healthcare, HIPAA, Health Care, SAAS, Full-Stack Developer, SaaS Developer, MVP Builder, React Developer, Node.js Developer, MERN Stack Developer, Product Designer, UX/UI Designer, iOS App Developer, Expo Developer, React Native Developer, Startup Developer, Figma Designer

Full-stack and React Native developer who builds web and cross-platform mobile apps, React, Next.js, Node.js, MongoDB · 5-star rated. Need one developer who can build your web app and mobile app without switching teams or losing context? I deliver complete, production-ready products across web and mobile — using React, Next.js, Node.js, MongoDB, and React Native for iOS & Android. Whether it's a SaaS web platform, a cross-platform mobile app, or both running off the same backend — I've got the full stack covered. What I build: ✅ Full-Stack Web Apps — React / Next.js + Node.js / Express backend ✅ Cross-Platform Mobile Apps — React Native (iOS & Android) ✅ REST API & GraphQL API — shared backend for web + mobile ✅ MongoDB & PostgreSQL Database Design ✅ Authentication — JWT, OAuth 2.0, NextAuth.js, Firebase Auth ✅ SaaS Dashboards, Admin Panels & Client Portals ✅ Push Notifications, Offline Support & App Store Deployment ✅ Responsive UI — Tailwind CSS, Material UI, Shadcn How I work: Clear communication, realistic timelines, and clean code your team can build on. You'll always know where the project stands — no surprises at delivery. Tech stack: JavaScript · TypeScript · React.js · Next.js · React Native · Node.js · Express.js · MongoDB · PostgreSQL · REST API · GraphQL · Firebase · Tailwind CSS · Expo · Git · Vercel · AWS Building a web platform, mobile app, or both? Send me your project brief and I'll respond promptly.

🏆 𝐓𝐨𝐩-𝐑𝐚𝐭𝐞𝐝 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 | 𝐒𝐡𝐨𝐩𝐢𝐟𝐲 𝐄𝐱𝐩𝐞𝐫𝐭 | 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 (𝐑𝐞𝐚𝐜𝐭 𝐍𝐚𝐭𝐢𝐯𝐞 & 𝐅𝐥𝐮𝐭𝐭𝐞𝐫) 🏆 Top Rated Freelancer ✅ 100% Job Success Score 💰 $20K+ Earned on Upwork 🚀 10+ Years of Experience in Web & Mobile Development Need a Shopify store that converts visitors into customers? Or a mobile app that delivers a seamless user experience? I help startups entrepreneurs and growing businesses build high quality Shopify stores custom and mobile applications that are scalable secure and designed for business growth. Over the years I have successfully delivered eCommerce stores business websites SaaS platforms and mobile applications for clients across different industries. My focus is not only on development but also on creating solutions that improve user experience increase conversions and support long term growth. 🛒 𝐒𝐡𝐨𝐩𝐢𝐟𝐲 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 * Shopify Store Setup * Shopify Theme Customization * Shopify Plus Development * Shopify Liquid Development * Custom Shopify Sections * Shopify App Integration * Payment Gateway Integration * Shopify Speed Optimization * Shopify Store Migration * Shopify Bug Fixes & Maintenance * Shopify CRO & Conversion Optimization 📱 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 * React Native Development * Flutter Development * Android App Development * iOS App Development * Firebase Integration * REST API Integration * Push Notifications * Admin Dashboard Development * App Deployment & Publishing * App Maintenance & Support 💡 𝐀𝐝𝐝𝐢𝐭𝐢𝐨𝐧𝐚𝐥 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 * UI UX Implementation * Figma to Shopify * Figma to WordPress * Figma to Mobile App * SaaS Application Development * CRM Integration * Stripe Integration * PayPal Integration * Third Party API Integration 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞? ✔️ Top Rated Upwork Freelancer ✔️ 100% Job Success Score ✔️ Strong Communication ✔️ Fast Turnaround Time ✔️ Clean Scalable Code ✔️ Long Term Technical Support ✔️ Reliable Project Delivery ✔️ Business Focused Approach I believe successful projects are built through clear communication proper planning and attention to detail. Whether you need a Shopify store WordPress website WooCommerce solution or a mobile application I can help turn your idea into a reliable and scalable product. Let's discuss your project and find the best solution for your business. Keywords: Shopify Developer, Shopify Expert, Shopify Plus Developer, Shopify Theme Developer, Shopify Store Designer, Shopify Liquid Developer, Shopify App Integration, Shopify Store Setup, Shopify Migration, Shopify Speed Optimization, Shopify SEO, WooCommerce Developer, Elementor Expert, Elementor Developer, WooCommerce Expert, Website Developer, Full Stack Developer, React Native Developer, Flutter Developer, Mobile App Developer, Android Developer, iOS Developer, API Integration, Firebase Developer, SaaS Developer, Figma to WordPress, Figma to Shopify, E Commerce Developer, Landing Page Developer, Shopify Store Development, Custom WordPress Development, Elementor Website Builder, WooCommerce Store Setup, Mobile Application Development, Cross Platform App Development, Front End Developer, Back End Developer, Node.js Developer, Next.js Developer, Website Optimization, Website Maintenance, E Commerce Website Development, Payment Gateway Integration, Custom Web Development, UI UX Implementation, Responsive Website Development.

Are you planning to develop something new? Or do you already have something live that's just not working the way you imagined? 𝐃𝐨𝐧'𝐭 𝐰𝐨𝐫𝐫𝐲 I am your problem solver, your builder, and your long-term partner all in one. Just tell me your vision. I will take it from there and turn it into reality. I am 𝐈𝐬𝐦𝐚𝐢𝐥 𝐑𝐚𝐧𝐚, Senior Mobile App Developer. I have spent 10+ 𝐲𝐞𝐚𝐫𝐬 building mobile apps, 30+ apps shipped, thousands of users served, and every single project delivered on time, and I genuinely can't wait to hear what you're building. Let's make it happen! 💡 What I Can Help You With: ✔ End-to-end Flutter app development ✔ MVP development for startups ✔ E-commerce, booking, on-demand & marketplace apps ✔ Payment integrations ✔ Real-time features: chat, notifications, live tracking ✔ Backend architecture: Node.js, Laravel, PHP ✔ Performance improvements & app scaling ✔ Adding features to existing apps Let's build something that matters. Drop me a message and tell me what you're working on. I'll give you my honest take within 24 hours. 𝐊𝐞𝐲𝐰𝐨𝐫𝐝𝐬: Flutter developer, Flutter app developer, Android app developer, iOS app developer, React Native Developer, Expo, Swift, Flutter Flow developer, Mobile App Redesign, UI/UX Prototyping, Php Developer, AI app developer, Cross-platform mobile developer, Mobile app development, AI mobile app developer, Artificial intelligence app development, Machine learning, Firebase app developer, API integration, Flutter Hybrid app developer, AI solutions for mobile apps, AI app developer, Mobile App Developer, Senior Mobile App Developer, Mobile App Development, Flutter Mobile App Development, Education App Developer, Mobile App Developer, Saloon Booking Mobile App, Food Delivery Mobile App Development, AI App Development, Chat Mobile App Developer, Flutter Developer, Social media App Development, Booking app development, On-demand Services mobile app,