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Hi, I’m Nithish, a Full-Stack Mobile App Developer specializing in building modern, scalable, and secure applications using React Native and Node.js. I help startups and businesses turn their ideas into fast, reliable mobile apps backed by robust APIs. My focus is building production-ready applications, not just demos. That means clean architecture, secure data management, and mobile experiences that users actually enjoy using. 📱 What I Can Build (Mobile) * Using React Native and Expo, I build high-performance cross-platform apps for iOS and Android, featuring: * Native Module Integration: Extensive experience using Expo Custom Dev Builds to bridge custom native Android/iOS functionalities. * Advanced Security & Auth: Implementation of biometric security, OAuth, JWT, and AES-256 encryption for secure local storage. * High-End UI/UX: Pixel-perfect UI translations and smooth, 60fps custom animations using Reanimated and Framer Motion. * Complex Media Handling: Robust file uploads, audio recording, and custom device directory management. * Offline-First Architecture: Ensuring seamless performance and data persistence even without a network connection. ⚙️ Backend APIs & Architecture Using Node.js, Express.js, and modern backend practices: * RESTful API development and seamless third-party integrations (e.g., AI endpoints, payment gateways). * Scalable database design and query optimization (PostgreSQL / MongoDB). * Secure authentication, authorization, and session management. * Reliable file storage and media processing systems. 🚀 Startup MVP & Complex Refactoring If you're building a startup or SaaS product, I can help you: * Build a scalable, market-ready mobile app MVP from the ground up. * Execute complex full-stack refactoring to drastically improve app speed and codebase maintainability. * Convert an existing web application into a fully native mobile experience. 💡 My Development Approach * Efficiency: Fast development cycles leveraging optimized workflows for rapid testing and deployment. * Scalability: Backend architecture built from day one to handle user growth. * Quality: Clean, documented, and maintainable code that saves you time and money in the long run. My goal is to help you ship your product faster without sacrificing enterprise-level quality. If you're looking for a developer who can handle both the intricacies of native mobile features and the backend that powers them, let's talk. I'd be happy to discuss your project!

My expertise in 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲 | 𝗠𝗼𝗯𝗶𝗹𝗲 𝗮𝗽𝗽 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 is proven by 𝟭𝟬𝟬% 𝟱-𝘀𝘁𝗮𝗿 𝗿𝗲𝘃𝗶𝗲𝘄𝘀 𝗳𝗿𝗼𝗺 𝗮𝗹𝗹 𝗺𝘆 𝗰𝗹𝗶𝗲𝗻𝘁𝘀! 𝘼𝙡𝙧𝙚𝙖𝙙𝙮 𝙝𝙖𝙫𝙚 𝙖𝙣 𝘼𝙄-𝙗𝙪𝙞𝙡𝙩, 𝙫𝙞𝙗𝙚-𝙘𝙤𝙙𝙚𝙙, 𝙤𝙧 𝙝𝙖𝙡𝙛-𝙛𝙞𝙣𝙞𝙨𝙝𝙚𝙙 𝙢𝙤𝙗𝙞𝙡𝙚 𝙖𝙥𝙥? 𝙄 𝙘𝙖𝙣 𝙝𝙚𝙡𝙥 𝙩𝙪𝙧𝙣 𝙞𝙩 𝙞𝙣𝙩𝙤 𝙖 𝙨𝙩𝙖𝙗𝙡𝙚, 𝙥𝙧𝙤𝙙𝙪𝙘𝙩𝙞𝙤𝙣-𝙧𝙚𝙖𝙙𝙮 𝙍𝙚𝙖𝙘𝙩 𝙉𝙖𝙩𝙞𝙫𝙚 𝙖𝙥𝙥. I specialize in fixing messy codebases, improving app architecture, resolving bugs, stabilizing Expo/React Native builds, polishing UI/UX, integrating APIs properly, optimizing performance, and preparing apps for App Store / Play Store launch. 𝗧𝗼𝗽 𝗥𝗮𝘁𝗲𝗱 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲 𝗘𝘅𝗽𝗲𝗿𝘁 with 9+ years building high-performant, intuitive 𝗺𝗼𝗯𝗶𝗹𝗲 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 for 𝗶𝗢𝗦 & 𝗔𝗻𝗱𝗿𝗼𝗶𝗱. Specialised in delivering 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀 with 𝗔𝗜 integration (to fast track dev process using 𝗖𝘂𝗿𝘀𝗼𝗿, 𝗖𝗹𝗮𝘂𝗱𝗲 𝗖𝗼𝗱𝗲, 𝗖𝗼𝗱𝗲𝘅) and implementation of 𝗥𝗲𝗱𝘂𝘅, 𝗙𝗶𝗿𝗲𝗯𝗮𝘀𝗲, 𝗚𝗿𝗮𝗽𝗵𝗤𝗟, 𝗥𝗲𝘀𝘁 𝗔𝗣𝗜𝘀, 𝗥𝗲𝗮𝗻𝗶𝗺𝗮𝘁𝗲𝗱 𝗮𝗻𝗶𝗺𝗮𝘁𝗶𝗼𝗻𝘀. • Proven React Native expertise • 16 Jobs - 16 FIVE STAR reviews • 8+ years of cross-platform mobile development • 20+ published apps on Google Play Store & Apple App Store • End-to-end React Native, EXPO development expertise: From product initiation/design phase up to the point of deploying apps to stores. 🔶 𝗪𝗵𝘆 𝗛𝗶𝗿𝗲 𝗠𝗲 𝗙𝗼𝗿 𝗬𝗼𝘂𝗿 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲 𝗣𝗿𝗼𝗷𝗲𝗰𝘁? • Proficient in iOS & Android mobile application development in React Native with an expertise to make scalable mobile apps that are elegant & intuitive to use. Well versed with Expo, TypeScript, Redux, Firebase including Backend services like AWS, Stripe, Supabase, Node.JS. • Expert in 𝗗𝗘𝗩𝗢𝗣𝗦 for creating and managing CI/CD pipelines according to the server env (DEV/STAGE/PROD) using GITHUB, GITLAB, Microsoft's Azure to fast track the mobile build processes for iOS and Android. • 𝙁𝙧𝙚𝙚 𝘼𝙛𝙩𝙚𝙧-𝙇𝙖𝙪𝙣𝙘𝙝 𝙨𝙪𝙥𝙥𝙤𝙧𝙩 for 2 months. • Fast track programming using 𝗔𝗜 𝗔𝗴𝗲𝗻𝘁𝗶𝗰 𝗖𝗼𝗱𝗶𝗻𝗴 𝗜𝗗𝗘𝘀 𝗹𝗶𝗸𝗲 𝗖𝘂𝗿𝘀𝗼𝗿, 𝗖𝗹𝗮𝘂𝗱𝗲 𝗖𝗼𝗱𝗲, 𝗖𝗼𝗱𝗲𝘅 𝗲𝘁𝗰. 🔶 𝗖𝗹𝗶𝗲𝗻𝘁'𝘀 𝗧𝗲𝘀𝘁𝗶𝗺𝗼𝗻𝗶𝗮𝗹𝘀 𝗢𝗻 𝗠𝘆 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲: ★★★★★ "This was my second time working with Devanshu, and I would wholeheartedly recommend him to anyone in need of a talented and reliable front-end or mobile developer." - 𝗠𝗿. 𝗔𝗮𝗿𝘁 𝗕𝗲𝗿𝗸𝗵𝗼𝘂𝘁, 𝗡𝗲𝘁𝗵𝗲𝗿𝗹𝗮𝗻𝗱𝘀 ★★★★★ "Great work, very organized , I totally recommend this developer." - 𝗠𝗿. 𝗘𝗟 𝗛𝗼𝘂𝗰𝗶𝗻𝗲 𝗕𝗼𝘂𝗴𝗮𝗿𝗳𝗮𝗼𝘂𝗶, 𝗠𝗼𝗿𝗼𝗰𝗰𝗼 🔶 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲 | 𝗠𝗼𝗯𝗶𝗹𝗲 𝗔𝗽𝗽 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸: • Languages - React Native, EXPO, TypeScript, JavaScript • State management - Redux, Zustand, Context APIs • Payment frameworks - In-App Purchase, RevenueCat, Adapty, Stripe • Analytics - MixPanel, Google's Firebase • Ads integration - Google's AdMob • Animations - Reanimated, Lottie, Skia • Caching - Apollo GraphQL, URQL, FastImage • DevOps - CI/CD Pipelines, GitHub Actions • Deployment - CodePush, App Store & Play Store submission 🔶 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲 𝗠𝗼𝗯𝗶𝗹𝗲 𝗔𝗽𝗽 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 𝗕𝘆 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝘆: I've successfully delivered React Native solutions across multiple industries like e-commerce with secure payment gateways, social media with real time features, health & fitness tracking, navigation & location based services, entertainment & streaming, education & learning content, financial & trading for both iOS & Android mobile applications 🔶 𝗠𝘆 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗣𝗿𝗼𝗰𝗲𝘀𝘀: • Detailed PRD (Product Requirements Document) outlining the scope, features, and technical needs. • Proposal with milestones and their timelines. • Tracker on Google Sheets for daily updates. • Demo release on every third day to get feedbacks. • Super descriptive of what I am working on and what my though process is, by always over-communicating. 🔶 𝗠𝘆 𝗔𝘃𝗮𝗶𝗹𝗮𝗯𝗶𝗹𝗶𝘁𝘆: • 𝗗𝗲𝗽𝗲𝗻𝗱𝗶𝗻𝗴 𝘂𝗽𝗼𝗻 𝘁𝗵𝗲 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗿𝗲𝗾𝘂𝗶𝗿𝗲𝗺𝗲𝗻𝘁𝘀 𝗮𝗻𝗱 𝗱𝗲𝗮𝗱𝗹𝗶𝗻𝗲𝘀, 𝗜 𝗰𝗮𝗻 𝗰𝗼𝗻𝘁𝗿𝗶𝗯𝘂𝘁𝗲 𝘂𝗽𝘁𝗼 60 𝗵𝗼𝘂𝗿𝘀 𝗮 𝘄𝗲𝗲𝗸. If you're looking to develop a high-quality, scalable 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲 𝗺𝗼𝗯𝗶𝗹𝗲 𝗮𝗽𝗽 for 𝗶𝗢𝗦 & 𝗔𝗻𝗱𝗿𝗼𝗶𝗱, 𝗜'𝗺 𝗮𝘃𝗮𝗶𝗹𝗮𝗯𝗹𝗲 𝗳𝗼𝗿 𝗮 𝗳𝗿𝗲𝗲 𝟭𝟱-𝗺𝗶𝗻𝘂𝘁𝗲 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻 𝗰𝗮𝗹𝗹. Let's discuss how I can help bring your vision to life! 🚀 #ReactNative #MobileAppDevelopment #iOSDevelopment #AndroidDevelopment #CrossPlatformApps #ReactNativeDeveloper #MobileApplications #AppDevelopment

Full-Stack Developer | Web & Mobile | AI | The Guy Who Gets It Done Let me be straight with you — I don't just build apps. I build experiences. Digital products that make your business more money, save you time, and leave your competitors wondering what hit them. 5+ years. Hundreds of hours of code. Zero failed deadlines. I'm not here to waste your time, and I'm definitely not here to waste mine. You want results? Good. So do I. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔫 THE ARSENAL ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✅ AI & LLMs — OpenAI (GPT-4o), Claude, Gemini, LangChain, LlamaIndex, Hugging Face, Pinecone, RAG Pipelines ✅ Mobile — Flutter, Kotlin, Java, Socket. io | iOS & Android ✅ Web — React, Next.js, Angular, Node.js, WordPress | TypeScript, JavaScript, HTML5/CSS3 ✅ UI/UX — Figma, Adobe XD, Photoshop, Illustrator ✅ Payments — Stripe, Razorpay, PayPal ✅ APIs — Node.js/Express.js, Django/Flask, REST & GraphQL ✅ Databases — PostgreSQL, MySQL, MongoDB ✅ Cloud — AWS (S3, EC2, SES, SNS, SQS), Firebase, Heroku ✅ DevOps — Git, GitHub, GitLab, Bitbucket, Docker ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Most developers will ghost you, miss deadlines, and send you code that looks like it was written at 3 am. I'm not most developers. I communicate. I deliver. I close. So if you're serious about your project — message me. Let's get to work.

Here's the deal: share your idea, and I'll turn it into a functional, AI-powered, scalable mobile app that solves real problems and generates revenue built with React Native, Flutter, or FlutterFlow. 📱 How Your AI Mobile App Goes From Idea to Live Product: Every mobile app project follows a clear, proven journey: UI/UX Design → AI-Powered Mobile App Development (iOS/Android) → Backend/API Development → Testing & QA → App Store / Play Store Deployment → Post-Launch Maintenance I majored in Software Engineering and have used a wide range of technologies React Native, Flutter, FlutterFlow, and AI integrations to help businesses build mobile apps generating millions in revenue. Over the past 8 years, I've developed a wide range of AI-powered iOS and Android apps, including: ✅ Food delivery app ✅ Ride booking app (like Uber) ✅ Real estate listing app (like Airbnb) ✅ Social media mobile app (like TikTok/Instagram) ✅ Startup/investment management app ✅ Wellness & fitness app (like CalAI, MyFitnessPal) ✅ Sports mobile app ✅ E-commerce mobile app ✅ Language learning app (like Duolingo) ✅ Event management app ✅ Grocery/meal planning app ✅ Freelance marketplace app ✅ Service booking app (Home/HVAC) ✅ Inventory management app ✅ Learning management app ✅ Appointment booking app (salon/doctor) ✅ Venue booking app (sports/events) ✅ Task management app (project management/to-do) 🔧 Core Expertise React Native & Flutter Development — Cross-platform iOS & Android apps with native performance FlutterFlow Development — Rapid MVP builds using low-code/no-code tooling AI Mobile App Development — Integrating OpenAI, Claude, LangChain, and AI Agents into mobile products Monday Integration — Custom workflows, dashboards, and automation connected to your mobile app Firebase & API Integration — Authentication, in-app purchases, real-time data, backend APIs 🤝 As Your Technical Partner, I Go Beyond Development: → Technology & architecture consulting → Product roadmap & feature prioritization → Cost-effective tech stack selection with long-term planning → Scalability strategy as your user base grows → Technical support during investor or stakeholder discussions. 🛠️ Maintenance & Long-Term Support I provide free post-delivery support for 6 weeks, followed by flexible maintenance plans tailored to your product needs, usage scale, and roadmap. Keywords: AI Mobile App Developer • React Native Developer • Flutter Developer • FlutterFlow Expert • Monday Integration • Full Stack Mobile App Developer • Full Stack AI Developer • iOS Developer • Android App Developer • Cross-Platform Development • AI App Developer • Mobile App Development Consultant • Flutter Firebase • Dart Developer • User Authentication • In-App Purchases • API Integration • Startup MVP Developer

🥇 TOP 1% BEST REACT NATIVE DEVELOPERS ON UPWORK 🥇 CERTIFIED BY META & UPWORK 🥇 120+ MOBILE APPS SHIPPED TO APP STORE & PLAY STORE 🥇 PROVEN TRACK RECORD: 5★ RATING • 7,000+ UPWORK HOURS 🎯 TRUSTED BY: MINUTES AI and  KAVLO AI PLATEFORM 🎯 FROM MVP TO 1M USERS 🚀 SCALABLE ARCHITECTURE DELIVERY ⭐⭐⭐⭐⭐ "Gopi is a very hardworking and dedicated team member. She showed up every day with consistency and focus, and her commitment to our project never wavered. I highly recommend her to anyone seeking a reliable and driven contributor." (Upwork client, 344-hour React Native frontend engagement, 5-star close) As a Senior React Native Developer with 8+ years of production experience, I build React Native mobile apps for iOS and Android as a single coherent codebase. Most "React Native developer" posts get bid by web React developers who treat mobile as a thin shell over a web app. That is not the same thing as knowing React Native CLI vs Expo trade-offs, native module debugging on Android, or App Store submission edge cases that kill 1.0 launches. I take work in React Native mobile only, not web React with mobile bolted on. 🔶 Android React Native Expo Audio Recording App: $𝟭𝟮,𝟳𝟮𝟱 engagement, 𝟱𝟬𝟵 hours, 5-star close, podcast and audiobook player with offline support and App Store deployment 🔶 React Native Frontend Mobile App: $𝟲,𝟭𝟴𝟲 engagement, 𝟯𝟰𝟰 hours, 5-star close, long-running React Native build with consistent daily delivery on aggressive timelines 🔶 Fullstack React Native + Node.js Mobile App: $𝟮,𝟭𝟭𝟳 engagement, 𝟭𝟰𝟬 hours, 5-star close, React Native frontend with Node.js backend, single-developer ownership of the data flow 🔶 Multi-Vendor Delivery Mobile App (React Native Expo): full marketplace flow, three user types, payment integration, App Store and Play Store submission 𝗪𝗛𝗔𝗧 𝗜 𝗗𝗢 ✅ React Native Mobile App Development: production React Native CLI and Expo builds for iOS and Android, TypeScript throughout, App Store and Play Store submission ready ✅ React Native Performance Optimization: smooth animations with React Native Reanimated, list virtualization, memory leak debugging, real-device performance tuning on lower-end Android ✅ React Native + Node.js Full Stack: mobile frontend with Node.js or Nest.js backend, REST and GraphQL APIs, single React Native developer ownership end to end ✅ React Native Animation and UI/UX: complex gesture handling, smooth transitions, React Native Tailwind styling, pixel-accurate interfaces matching design specs ✅ App Store and Play Store Submission: code signing, provisioning profiles, review compliance, TestFlight and Internal Testing rollouts that pass on first submission ✅ Native Module Integration: bridging native iOS and Android code where React Native alone cannot deliver, in-app purchases, push notifications, deep links ✅ React Native Codebase Refactoring: rescuing legacy React Native mobile codebases from previous developers, modernizing to current versions, eliminating tech debt before production scale 𝗪𝗛𝗢 𝗜 𝗪𝗢𝗥𝗞 𝗪𝗜𝗧𝗛 🎯 Founders and product teams launching React Native mobile apps in production, not prototypes 🎯 SaaS companies adding a mobile app to an existing web product where one developer needs to own the full mobile build without handoff friction 🎯 Agencies subcontracting React Native developer work where the delivery standard is App Store grade and timelines are real 🎯 Teams rescuing a legacy codebase from a previous React Native developer who left tech debt behind 🎯 Engagements of 4+ weeks minimum, 30+ hours per week, with decision authority on the client side 𝗠𝗬 𝗣𝗥𝗢𝗖𝗘𝗦𝗦 Architecture Review: 24-hour turnaround on a React Native CLI vs Expo decision, navigation and state management choice, plus React Native developer scope estimate Design: component architecture, native module integration points, API contract, and App Store submission boundary locked before code begins Build: production React Native mobile code with TypeScript, tests, real-device QA across iOS and Android, and clear handoff documentation Deploy and Iterate: TestFlight and Internal Testing rollout, crash monitoring with Sentry, App Store and Play Store submission, refinement based on real user feedback Send me a message or invite me to your React Native mobile project. Free 24-hour architecture review for React Native developer engagements, no commitment required. #React Native Developer #React Native Mobile # Claude Code Expert # React Native developer

𝗬𝗼𝘂 𝗴𝗲𝘁 𝗮 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻-𝗿𝗲𝗮𝗱𝘆 𝗺𝗼𝗯𝗶𝗹𝗲 𝗮𝗽𝗽 — built right the first time, launched on time, and working exactly as you imagined. I've built apps for Amazon Fire TV & Prime Video — used by millions of users worldwide. That same standard of quality is what I bring to every project. ⚡ WE MAY BE A GREAT FIT IF YOU'RE THINKING: ● I want my app built by someone who has shipped real production apps ● I need iOS & Android — done properly ● I've hired developers before and got poor quality — never again ● I want clear communication and on-time delivery ● I need someone who understands my product, not just the code ━━━━━━━━━━━━━━━━━━━━━━━━ 𝗪𝗛𝗔𝗧 𝗬𝗢𝗨 𝗚𝗘𝗧: ━━━━━━━━━━━━━━━━━━━━━━━━ ✅ React Native apps for iOS & Android ✅ Native iOS — Swift & Objective-C ✅ Native Android — Kotlin & Java ✅ REST API & Third-party SDK Integration ✅ Firebase, Supabase & Backend Integration ✅ RevenueCat & In-App Purchases ✅ Push Notifications (FCM/APNs) ✅ App Store & Play Store Launch ✅ Performance Optimization & Bug Fixing ✅ Post-launch Support & Maintenance ━━━━━━━━━━━━━━━━━━━━━━━━ 𝗠𝗬 𝗣𝗥𝗢𝗖𝗘𝗦𝗦: ━━━━━━━━━━━━━━━━━━━━━━━━ 1️⃣ Free 15-min call — understand your idea 2️⃣ Clear roadmap — timeline + cost upfront 3️⃣ Milestone-based development 4️⃣ Real device testing — iOS & Android 5️⃣ App Store & Play Store launch 6️⃣ Post-launch support No surprises. No hidden costs. You always know exactly where your project stands. ━━━━━━━━━━━━━━━━━━━━━━━━ 𝗜𝗡𝗗𝗨𝗦𝗧𝗥𝗜𝗘𝗦 𝗜'𝗩𝗘 𝗪𝗢𝗥𝗞𝗘𝗗 𝗜𝗡: ━━━━━━━━━━━━━━━━━━━━━━━━ - Streaming & Entertainment (Amazon/Prime) - E-commerce & Marketplace - Healthcare & Fitness - Fintech & Payments - Education & E-learning - Real Estate - Sports & Recreation ━━━━━━━━━━━━━━━━━━━━━━━━ 𝗪𝗛𝗬 𝗖𝗟𝗜𝗘𝗡𝗧𝗦 𝗖𝗛𝗢𝗢𝗦𝗘 𝗠𝗘: ━━━━━━━━━━━━━━━━━━━━━━━━ ⭐ 100% Job Success Score ⭐ Top Rated on Upwork ⭐ 7 Completed Projects — All 5 Stars ⭐ Fast Responder & Clear Communicator ⭐ Production-quality code every time 📩 Send me a message — tell me about your app idea. I'll give you a clear plan to bring it to life.