Nguyen B.

I build, maintain, and ship production mobile applications with React Native, native iOS, and native Android. My main strength is going beyond the JavaScript layer. With 8+ ʏᴇᴀʀꜱ ᴏꜰ ʀᴇᴀᴄᴛ ɴᴀᴛɪᴠᴇ ᴇxᴘᴇʀɪᴇɴᴄᴇ and 9+ ʏᴇᴀʀꜱ ɴᴀᴛɪᴠᴇ ᴍᴏʙɪʟᴇ ᴀᴘᴘ ᴅᴇᴠᴇʟᴏᴘᴍᴇɴᴛ, I can work directly with Kotlin/Java, Swift/native iOS, native modules, SDK integrations, bridges, platform-specific bugs, performance issues, and production problems. I also use AI-assisted engineering workflows daily with tools such as Cursor, Codex, Claude, ChatGPT, GitHub Copilot, and other coding agents. This allows me to quickly understand large or unfamiliar codebases, implement features, debug issues, refactor AI-generated code, and ship faster while keeping the code maintainable. 🥇🥇🥇 TOP-RATED PLUS FREELANCER 🥇🥇🥇 🥇🥇🥇 100% Client Satisfaction🥇🥇🥇 🥇🥇🥇 AI Agent and Automation Expert🥇🥇🥇 🥇🥇🥇 Industry Expertise🥇🥇🥇 🥇🥇🥇 Top 1% Talent on Upwork🥇🥇🥇 "5🌟Ratings on Clutch" 🚀 𝐖𝐇𝐀𝐓 𝐈 𝐂𝐀𝐍 𝐇𝐄𝐋𝐏 𝐘𝐎𝐔 𝐖𝐈𝐓𝐇 ➡️ Build React Native applications from scratch ➡️ Take over and maintain existing React Native codebases ➡️ React Native ↔ native iOS/Android integration ➡️ Native modules and third-party SDK integration ➡️ Kotlin/Java Android development ➡️ Swift/iOS development ➡️ Production crash and performance debugging ➡️ React Native modernization and migration ➡️ AI-powered mobile applications and LLM integrations ➡️ Review, debug, refactor and productionize AI-generated code ➡️ App Store / Google Play release and CI/CD ➡️ Backend/API integration and real-time features 📱 𝐑𝐄𝐀𝐂𝐓 𝐍𝐀𝐓𝐈𝐕𝐄 💼 8+ ʏᴇᴀʀꜱ ᴇxᴘᴇʀɪᴇɴᴄᴇ React Native, TypeScript, Redux, Zustand, MobX, Realm, SQLite, MMKV, WatermelonDB, REST APIs, WebSockets, authentication, background tasks, native modules, Fastlane, Bitrise and AWS. 🍎 𝐢𝐎𝐒 & 🤖 𝐀𝐧𝐝𝐫𝐨𝐢𝐝
(𝘎𝘰𝘰𝘨𝘭𝘦 𝘤𝘦𝘳𝘵𝘪𝘧𝘪𝘤𝘢𝘵𝘦 📜) 7+ ʏᴇᴀʀꜱ ᴏꜰ ᴀɴᴅʀᴏɪᴅ ᴅᴇᴠᴇʟᴏᴘᴍᴇɴᴛ (Java/Kotlin), 3+ ʏᴇᴀʀꜱ ᴏꜰ ɪᴏꜱ ᴅᴇᴠᴇʟᴏᴘᴍᴇɴᴛ (Objective C/Swift) with experience working close to the native platform. Android: Kotlin, Java, Coroutines, RxJava, Retrofit, Dagger/Hilt, Room, SQLite, Realm, Espresso, Robolectric, Fastlane and Bitrise. iOS: Swift/native integration, React Native bridges, native modules, SDK integration, authentication, networking and platform-specific debugging. This native experience is especially useful when a React Native project requires functionality that cannot be solved cleanly from JavaScript alone. 🤖 𝐀𝐈-𝐀𝐬𝐬𝐢𝐬𝐭𝐞𝐝 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 I use AI development tools as part of my daily engineering workflow, including Cursor, Codex, Claude, ChatGPT, GitHub Copilot and other agentic coding tools. I can: * Quickly understand and navigate large existing codebases * Debug and refactor AI-generated / AI-assisted code * Improve architecture and maintainability of "vibe-coded" applications * Use AI agents to accelerate implementation, testing and debugging * Integrate OpenAI, Anthropic Claude, Gemini, Grok, DeepSeek and custom LLM backends * Build AI features such as chat assistants, document analysis, summarization, content generation, recommendations, voice, image generation and personalized insights * Work with both cloud-based AI APIs and on-device AI where appropriate
 🦋 𝐅𝐋𝐔𝐓𝐓𝐄𝐑 💼 5+ ʏᴇᴀʀꜱ ᴇxᴘᴇʀɪᴇɴᴄᴇ Flutter, Dart, Provider, BLoC, MobX, GetX, SQLite, SharedPreferences, Dio, Flutter testing and CI/CD. 🌐 𝐀𝐝𝐝𝐢𝐭𝐢𝐨𝐧𝐚𝐥 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 Node.js, Express, MongoDB, REST APIs, real-time applications, e-commerce, crypto/Web3, health/fitness, video streaming, social applications and other production systems. 𝐖𝐇𝐘 𝐂𝐋𝐈𝐄𝐍𝐓𝐒 𝐖𝐎𝐑𝐊 𝐖𝐈𝐓𝐇 𝐌𝐄 I am comfortable joining a project at any stage — from building a new application to taking over an existing codebase that needs debugging, modernization, native integration or production support. If your project involves React Native + native iOS/Android + SDK integration, or you need an engineer who can use modern AI tools without relying on AI blindly, I can help.