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I build iOS apps that look exactly like the Figma design, run smoothly on real devices, and ship with clean, documented code your team can maintain for years. With 8 years of native iOS development, I’ve built and contributed to apps for Walmart (via Optimum), Nokia (via LTIMindtree), and other global brands like Openbank, Upstox, and Dunkin’. I don’t just write code—I take ownership of the full delivery, and leave behind a codebase that’s structured, readable, and easy to hand off. What I bring to your project: ✅ Pixel‑perfect Figma → SwiftUI/UIKit – your design, exactly, with smooth native animations. ✅ Clean architecture (MVVM, VIPER, SOLID) – I refactor messy codebases and build new apps that scale. ✅ Real‑device testing – no surprises after launch. ✅ Full documentation – architecture diagrams, setup guides, inline comments, so any developer can take over. ✅ On‑time delivery in your timezone – I’m brutally honest about deadlines and I stick to them. ✅ Long‑term partnership mindset – I’m here to earn your trust, not just a one‑off gig. 💼 What I can help your business with • End-to-end iOS app development • Native iOS apps using Swift & SwiftUI • Convert Android/Web apps into iOS apps • MVP development for startups • Long-term product maintenance & scaling • Performance optimization & refactoring • UI/UX implementation with pixel-perfect accuracy • App architecture improvement & technical consulting • Team collaboration and Agile/Scrum workflow 🛠 Technical Expertise • UI Development: UIKit, SwiftUI, Auto Layout, Core Animation • Reactive Programming: RxSwift, Combine • Networking & API Integration: RESTful APIs, URLSession, Alamofire • Backend & Cloud Services: Firebase, Firestore, Authentication, Analytics • Push Notifications: APNs, Firebase Cloud Messaging (FCM), OneSignal • Architecture Patterns: MVVM, Clean Architecture, Modular Architecture • Local Storage & Database: CoreData, UserDefaults, Realm • Media & Realtime Features: AVFoundation, WebSocket • AI & AR Features: CoreML, ARKit, Vision Framework • Authentication & Security: OAuth, JWT, Keychain • Maps & Location Services: MapKit, CoreLocation, Google Maps SDK • Testing & Debugging: XCTest, Instruments, Memory Leak Detection • CI/CD & Version Control: Git, GitHub, Fastlane, Xcode Cloud • Project Management: Agile, Scrum, Jira, Trello 📱 Notable apps I’ve worked on 📱 Walmart – Pharmacy refill flow, Tempo UI, MVVM + Coordinator 📱 Nokia – Enterprise field‑force app with offline sync 📱 Openbank – Loans & insurance modules 📱 Upstox – Stock trading and mutual fund features 📱 Dunkin’ – Order‑ahead and pickup flow 📱 Destiny Discover – Digital library app for schools If you’re looking for a senior iOS engineer who delivers pixel‑perfect, production‑ready code with zero hand‑holding, let’s talk.

Need an iOS app that launches fast and scales cleanly? With 12+ years in mobile development, I’ve delivered 50+ apps and helped products reach 25M+ active users for startups and funded teams. I build AI-powered iOS, Flutter, and React Native apps that ship quickly, perform reliably, and grow with your users. 🎯 HOW I CAN HELP YOU AI MOBILE APP DEVELOPMENT Turn your app idea into an AI-powered mobile product that boosts engagement, automates repetitive tasks, and improves user retention. I’ve built AI features with OpenAI and Claude that increased engagement by 50% and reduced manual interactions by 30%. IOS APP DEVELOPMENT Launch an iPhone or iPad app that feels polished, scales cleanly, and keeps users coming back. My iOS work has supported products with 25M+ active users and apps with 50M+ downloads. ANDROID APP DEVELOPMENT Reach Android users with an app built for speed, stability, and long-term growth. I’ve delivered Android products that improved performance by 25% and served thousands of daily users. FLUTTER AND REACT NATIVE DEVELOPMENT Ship one codebase across iOS and Android to reduce development time and accelerate launch. In my cross-platform work, I’ve cut build time by 45% while maintaining strong performance and user engagement. MVP DEVELOPMENT Validate your idea faster with a mobile MVP that helps you launch, learn, and attract funding sooner. I’ve helped startups launch products that went on to raise more than $5M from investors after release. 🏆 RESULTS "Vijay has done a great job building our very complicated iOS app and taken it from start to finish. We will keep using him on future work!" – Nicholas Carlton, Client "Vijay continues to complete milestones on time with great quality code that works as designed. I will keep using Vijay." – John, Client "Vijay is responsive, provides quality work on time." – Arnas Jagminas, Client 🎖 12+ years of mobile app development experience 🏅 Delivered 50+ applications across iOS, Android, Flutter, and React Native 🎖 Built products used by 25M+ active users and 50M+ downloads See full case studies in my portfolio below. ✉️ 𝗠𝗘𝗦𝗦𝗔𝗚𝗘 𝗠𝗘 Have an app idea, MVP, or AI feature you want to build? Message me on Upwork for a free consultation and a clear plan to launch, improve, or scale your mobile app. I typically respond within 4 hours and can help with urgent projects when needed. 𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸 I build apps in Swift, SwiftUI, and UIKit, choosing the right stack for speed and stability. I connect Firebase, Supabase, and Node.js for authentication, data, and APIs, then add OpenAI API or Claude API when a product needs AI. I manage delivery with Git and ship releases through TestFlight and the App Store. I build iOS development in Swift, ship mobile app development for startups, and extend products with API integration and AI app development.

If you have a business idea and you want to convert it into a mobile application, I would like to help you. I have 12+ years of experience in mobile app development. Expert in Swift, SwiftUI, Objective-C and Flutter. Please check the client's feedback: "It was a pleasure to work with Shrejash! He demonstrated his expertise in iOS; showed strong initiative on the project; excellent in communicating progress and presented any questions quickly so we could meet our deadline. He was always available when we needed him, and transparent when he had questions or issues. The app he built was produced exactly to the specifications – nothing missing, and each part thoroughly tested and polished. I would happily hire him again." Following are some kinds of projects that I have successfully completed:- - Product-based - E-commerce - Photo and Video - GPS based apps - Social networking apps - Enterprise apps - Medical apps - Utility apps My strong points: - Strong written and verbal English - Sound technical knowledge - Great communication skills - Top rated developer on Upwork - Very good reviews by clients

🏆 𝗧𝗢𝗣 𝟭% 𝗨𝗣𝗪𝗢𝗥𝗞 𝗙𝗥𝗘𝗘𝗟𝗔𝗡𝗖𝗘𝗥 💰 $𝟭𝗠+ 𝗘𝗔𝗥𝗡𝗘𝗗 🤝 𝗛𝗘𝗟𝗣𝗘𝗗 𝗧𝗢 𝗥𝗔𝗜𝗦𝗘 $𝟏𝟬𝗠+ 𝗙𝗨𝗡𝗗𝗜𝗡𝗚 𝗙𝗢𝗥 𝗠𝗬 𝗖𝗟𝗜𝗘𝗡𝗧𝗦 🚀 Top Rated Plus | Flutter Expert | Mobile App Development (iOS & Android) | Full-Stack & Web Apps | AI & BLE 🎯𝗪𝗛𝗢 𝗜 𝗪𝗢𝗥𝗞 𝗪𝗜𝗧𝗛 I help startups, founders, and businesses build world-class Mobile Apps, Websites, SaaS Platforms, and AI-powered products that drive growth, secure funding, and scale globally. Most developers build apps — I build products that generate real business results. If you need an expert Mobile App Developer, Full Stack Developer, Flutter Developer, iOS Developer, Android Developer, React Native Developer, or Web Developer who can take your idea from concept to launch, you’re in the right place. 𝗠𝗬 𝗣𝗥𝗢𝗩𝗘𝗡 𝗧𝗥𝗔𝗖𝗞 𝗥𝗘𝗖𝗢𝗥𝗗 𝗙𝗢𝗥 𝗪𝗛𝗬 𝗖𝗟𝗜𝗘𝗡𝗧𝗦 𝗖𝗛𝗢𝗢𝗦𝗘 𝗠𝗘 🏆 Top Rated Plus (Top 1%) on Upwork 💰 $1M+ earned | 13,000+ hours 📈 $10M+ raised by my clients 📲 5M+ Active users ⭐ 100% Job Success Score 🔁 90%+ repeat clients 🌍 500+ clients across US, Europe, Middle East & Globally 📱 MOBILE APP DEVELOPMENT • Native iOS: Swift, SwiftUI, Objective-C, Xcode • Native Android: Kotlin, Java, Android Studio • Cross-Platform: Flutter, FlutterFlow, React Native, Dart 🌐 WEB DEVELOPMENT • Frontend: React.js, Next.js, TypeScript, Tailwind CSS, HTML5, CSS3, JavaScript • Backend: Node.js, Express.js, Nest.js, PHP, Laravel, RESTful APIs, GraphQL, WebSockets • E-Commerce: Plugin & theme development, payment gateway integration, custom solutions • WordPress: Custom theme & plugin development, WooCommerce, Elementor, ACF • Other CMS: Webflow, Strapi, Contentful, Sanity, Ghost • E-Commerce Platforms: WooCommerce, BigCommerce — theme & app customization ⚙️ NO-CODE / LOW-CODE PLATFORMS • AI-Powered Builders: Lovable.AI, Bolt.new, Cursor, v0 by Vercel, Replit, Copilot, Claude/Anthropic • App Builders: FlutterFlow, Bubble, Glide, Adalo • Automation: Zapier, Make (Integromat), n8n ☁️ BACKEND & CLOUD SERVICES • Firebase: Firestore, Realtime DB, Auth, Storage, Cloud Functions • AWS: EC2, Lambda, S3, Amplify, Lightsail • GCP | Microsoft Azure | Supabase | Vercel | Hostinger 🗄️ DATABASE Firestore | MySQL | PostgreSQL | MongoDB | SQLite | Realm | Core Data | Supabase 🤖 AI & AUTOMATION • ChatGPT API & OpenAI Integration • Natural Language Processing (NLP) • Voice & Speech AI • Predictive Analytics 🎨 UI/UX DESIGN Figma | Sketch | Adobe XD | InVision | SwiftUI | Jetpack Compose | Flutter Widgets | Material UI 🔑 KEY FEATURES & INTEGRATIONS ✔️ Secure User Authentication & Social Logins (Google, Apple, Facebook, Twitter, LinkedIn) ✔️ Payment Gateways: Stripe, PayPal, Razorpay, Apple Pay, Plaid, In-App Purchases & Subscriptions ✔️ Real-Time Chat & Messaging (Twilio API, Firebase Chat) ✔️ Push Notifications | Video Calling | WebRTC ✔️ Maps & Geolocation: MapKit, Mapbox, Google Maps ✔️ Health & Fitness: HealthKit, Google Fit ✔️ Analytics: Firebase Analytics, Mixpanel, Crashlytics, Google Analytics ✔️ QA & Testing: Unit Testing, Integration Testing, Regression Testing ✔️ Project Tools: Git, GitHub, Bitbucket, JIRA, Trello, Asana 🏗️ INDUSTRIES I HAVE DELIVERED IN E-Commerce | Fintech & Banking | Health & Fitness | Social Networking & Dating | On-Demand Services | Food Delivery | Ride Booking | Real Estate | SaaS | Education & E-Learning | Media & Entertainment | Streaming & Audio | Healthcare | Logistics & Transport | Marketplace | Travel & Navigation | Wellness & Coaching | Legal Services | Event & Booking | Automotive | Fashion & Lifestyle | Hospitality 🔍 KEYWORDS Mobile App Developer · iOS App Developer · Android App Developer · Flutter Developer · React Native Developer · FlutterFlow Developer · Swift Developer · Kotlin Developer · Full Stack Developer · Web Application Developer · SaaS Developer · MERN Stack Developer · Firebase Developer · AWS Developer · Node.js Developer · React.js Developer · Next.js Developer · API Integration · ChatGPT Integration · AI App Developer · Lovable.AI · Bolt.new · No-Code Developer · Low-Code Developer · FlutterFlow · Bubble · Webflow · WordPress Developer · WooCommerce · Shopify · Strapi · Contentful · CMS Development · Plugin Development · Theme Development · Fintech App Developer · E-Commerce App Developer · Dating App Developer · Ride Booking App Developer · On-Demand App Developer · Cross-Platform App Developer · RESTful API · GraphQL · TypeScript · Supabase · Payment Gateway Integration · In-App Purchases · Push Notifications · HealthKit · MapKit · Mapbox · Alamofire · Twilio · Google Analytics · QA Testing · Unit Testing · Regression Testing · Figma · UI/UX Design

🏆 Top Rated | 💯 100% Job Success | 7+ Years Experience I help startups, SaaS companies, founders, and growing businesses build production-ready mobile apps, web applications, SaaS platforms, and AI-powered solutions from idea to launch. I specialize in React Native, Full-Stack Development, Flutter, and AI-powered development workflows, working directly with clients to understand requirements and take ownership across the complete product lifecycle - from architecture and development to APIs, integrations, testing, deployment, and long-term support. This Forward Deployed Engineer (FDE) approach means you get one technical partner who understands the problem, builds the solution, and stays involved through production. 🚀 What I Can Build • AI-Powered Mobile Applications - AI integrations, LLM-powered features, intelligent workflows, chatbots, and automation • React Native Apps - iOS & Android, Expo, EAS, TypeScript, Redux, Native Modules, BLE, Push Notifications • Flutter Applications - Cross-platform iOS & Android apps and existing Flutter application development • Full-Stack Applications - React, Next.js, Node.js, NestJS, REST & GraphQL APIs • SaaS Platforms & MVPs - Authentication, dashboards, subscriptions, real-time features, and scalable architecture • Backend & Cloud Solutions - Firebase, Supabase, PostgreSQL, MongoDB, Prisma, AWS, Docker, CI/CD • Payments & Subscriptions - Stripe, RevenueCat, In-App Purchases, Razorpay • Real-Time & Hardware Integration - Chat, notifications, live updates, BLE devices, and native integrations • Performance & Modernization - Bug fixing, performance optimization, legacy app modernization, and app-store deployment 🧠 AI-Powered Development I use modern AI-powered development workflows and tools to accelerate coding, debugging, refactoring, testing, research, documentation, and complex problem-solving. I combine AI with strong engineering fundamentals to deliver software faster while maintaining control over architecture, security, code quality, scalability, and production reliability. 💼 7+ Years of Production Experience I've contributed to 75+ mobile and web applications across: Healthcare | Fitness | AI SaaS | FinTech | Logistics | Enterprise | Education | E-commerce | Marketplace | Social Networking My experience includes healthcare platforms, BLE medical-device applications, fitness subscription apps, AI-powered platforms, enterprise systems, marketplaces, education platforms, and real-time applications. ⭐ Why Clients Work With Me • One developer who can handle the product end-to-end • Strong React Native and full-stack engineering experience • AI-powered development workflows for faster execution • Production-focused architecture and implementation • Proactive problem-solving and technical ownership • Clear communication and reliable delivery • Scalable and maintainable code built for long-term growth Whether you need to build a React Native app, Flutter app, AI-powered application, SaaS platform, full-stack product, BLE solution, or modernize an existing application, I can take ownership from architecture through production. If you're looking for a Senior React Native & Full-Stack Developer who combines strong engineering experience with modern AI-powered development, let's discuss your project.

I'm Jatinder Kumar, a passionate iOS developer turning app dreams into delightful realities. What I Bring to the Table: Swift & SwiftUI Mastery: From core Swift proficiency to harnessing the power of SwiftUI, I ensure your app leverages the latest technologies for a seamless and engaging user experience. visionOS Expertise: Unleashing the immersive potential of spatial computing, I can integrate visionOS features to create truly innovative and interactive applications. Visionary Collaboration: I embrace teamwork and active listening. We'll collaborate closely to refine your ideas and translate them into a stunning, functional app that exceeds expectations. Crystal-Clear Communication: Keeping you informed every step of the way is paramount. I prioritize open communication to ensure your vision is heard and understood. Agency Backing: Enjoy the peace of mind of a full-service agency behind your project, with access to comprehensive resources and expertise beyond just development. Why Choose Me? Upwork Top Rated & Verified Mobile Developer Proven Track Record: Google Playstore Rankings: #74 Overall | #52 Sports | #11 Productivity Apple Store & Google Playstore Downloads: 500k+ | 100k+ | 50T+ etc. Client Satisfaction: 5-star ratings | 99% Job Success | 7+ years experience 48+ projects completed | 20+ apps published to Apple App Store / Google Play Extensive iOS experience (Swift, Objective-C, Swift UI, visionOS, macOS) Communication is Key: I believe in open and frequent communication, ensuring we're always on the same page. Ready to Get Started? Let's chat about your app idea! I'm eager to hear your vision and help you create something truly special with the power of mobile, iPad, macOS, visionOS, and SwiftUI. ******* Get Quality Service with Honesty *****
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