I'm a mobile technical lead with 12+ years building, stabilizing, and shipping production apps across Android, iOS, Flutter, and React Native. Teams bring me in when an app is unstable or a release is stuck — I inherit messy codebases, drive down crash rates, unblock release pipelines, and ship SDKs other developers build on. Recent work: • Yahoo Fantasy Sports — redesigned core user-facing screens and refactored from MVP to MVVM, cutting the crash rate to target. • Portal (Web3 wallet) — led the Android and React Native SDKs that other teams integrate. • Unified Remote — Android app with 10M+ installs worldwide. • Plume — B2B Android app with multiple product flavors used across 10+ businesses. Native depth, cross-platform range: • Android — Kotlin, Java, Jetpack Compose, Coroutines, Clean Architecture (Google Certified Associate Android Developer). • iOS — Swift, shipped multiple apps end-to-end from Figma to App Store and post-release maintenance. • Flutter — Riverpod, GetX, GoRouter, Dio. • React Native — app development and SDK maintenance. • Firebase — Auth, Firestore, Remote Config, Cloud Messaging, Crashlytics, and on-device ML. I write clean, maintainable code, take full ownership of delivery, and build stable, performance-focused apps that hold up in production. If you need someone who can both lead the architecture and ship the hard parts, let's talk.

Enthusiastic iOS developer, audio engineer and musician. Providing solutions for businesses that need top-tier iOS experiences or audio work.

🔥 Do you need to build a high-quality Mobile App that brings real Revenue — not just downloads? 🔥 ✔️ I Develop Mobile Apps designed to maximize your chances of Success. ✔️ I have a background in Product Management. I don’t just write code — I build Businesses. ✨ MVP Strategy: I help you define the core features that validate your idea without wasting time and budget on the wrong direction. ✨ Product-First Approach: My development process gives you the exact instruments you need to test your hypotheses in the real market. I develop cross-platform and native iOS and Android applications using React Native, TypeScript, Swift / SwiftUI / Kotlin. I specialize in subscription-based apps, combining strong engineering skills with deep product growth expertise. 💡 My focus areas include: - AI-powered apps - Productivity tools - Utilities - Health & fitness apps - Trackers - Lifestyle - Business applications. 💡 I’m a Senior Mobile Developer with 10+ years of experience in iOS/Android development and a proven track record in building and scaling mobile applications with subscriptions. My focus is not just on code — I help you create a profitable mobile product that users love and that meets all App Store and Google Play requirements. 💡 As a Growth expert, I can advise how to increase app engagement, optimize retention, and grow your MRR. Whether you’re launching a new mobile app or improving an existing one, I can guide you through development, monetization, and analytics setup. 🏆 My achievements: - 10,000,000+ app users - 100,000+ App Store subscriptions - 99% crash-free rate - Trial conversion rate — up to 15% - 1st day retention rate — up to 40% 🎓 My approach: - Agile/SCRUM development for fast feedback - Data-driven decisions using Amplitude / AppsFlyer - Subscription analytics via Adapty / RevenueCat - Clean and scalable code in TypeScript, following SOLID principles - Clear, structured delivery process and transparent communication You’ll get: - A stable, scalable Cross-Platform app ready for the App Store or Google Play - Advanced analytics and dashboards for decision-making - Subscription tracking and flexible revenue management - A partner who understands both mobile development and growth strategy 👉 If you’re looking for a mobile developer who can build and grow your iOS and/or Android app from idea to revenue — let’s talk. My skills in iOS development: React Native, TypeScript, Swift, SwiftUI, Flutter, FlutterFlow, Dart, Kotlin, iOS, Android, Objective C, UIKit, Multithreading, Memory management, API, JSON, HTML, XML, Networking, Push notifications, CoreData, Combine, SOLID principles, Design patterns, MVC, MVP, MVVM, Coordinators, Xcode, GIT, SwiftLint, DI, CI/CD, Firebase, AppStore, ASO, Amplitude, AppsFlyer, Figma, UI/UX, Agile, Scrum, Kanban, AI.

𝙈𝙤𝙨𝙩 𝙖𝙥𝙥𝙨 𝙛𝙖𝙞𝙡 𝙣𝙤𝙩 𝙗𝙚𝙘𝙖𝙪𝙨𝙚 𝙤𝙛 𝙗𝙖𝙙 𝙞𝙙𝙚𝙖𝙨 - 𝙗𝙪𝙩 𝙗𝙚𝙘𝙖𝙪𝙨𝙚 𝙤𝙛 𝙗𝙖𝙙 𝙚𝙭𝙚𝙘𝙪𝙩𝙞𝙤𝙣. I've spent 10+ years making sure that doesn't happen. I'm Jay - a mobile and web app developer specializing in AI-powered applications, native iOS and Android development, and cross-platform apps using React Native and Flutter. I hold a 100% Job Success Score and have maintained Top Rated Plus status on Upwork for over 8 consecutive years. I don't just write code. I think through your product, challenge weak assumptions early, and build things that actually hold up in the real world. My edge? I've delivered projects across enough domains - health, fintech, social, ecommerce, sports, media, edtech - to know what works before we write a single line. And right now, my sharpest focus is on AI-powered mobile and web applications: products that don't just look smart, but genuinely behave that way. 𝙒𝙝𝙖𝙩 𝙄 𝙗𝙪𝙞𝙡𝙙: - AI and Intelligent Apps - LLM integrations, computer vision, automation pipelines, OpenAI, custom AI workflows - Native iOS Development - Swift | SwiftUI | Objective-C | Xcode - Native Android Development - Kotlin | Java | Android Studio - Cross-Platform Apps - React Native | Flutter - Web Development - React.js | Next.js | HTML/CSS - Backend and API Development - Python (FastAPI, REST) | Node.js | Express.js | Laravel - Database and Cloud - PostgreSQL | MongoDB | Firebase | AWS | Google Cloud | Azure 𝙒𝙝𝙖𝙩 𝙬𝙤𝙧𝙠𝙞𝙣𝙜 𝙬𝙞𝙩𝙝 𝙢𝙚 𝙖𝙘𝙩𝙪𝙖𝙡𝙡𝙮 𝙡𝙤𝙤𝙠𝙨 𝙡𝙞𝙠𝙚: No ghosting. No vague updates. No surprises at the finish line. I follow Agile Scrum methodology, communicate proactively, and treat your deadline like it's mine - because my reputation depends on it. And if your project needs more firepower - I also run a 75+ 𝙥𝙚𝙧𝙨𝙤𝙣 𝙙𝙚𝙫𝙚𝙡𝙤𝙥𝙢𝙚𝙣𝙩 𝙖𝙜𝙚𝙣𝙘𝙮. Same standards, bigger bandwidth. Whether it's just me or a full dedicated team, you get senior-level oversight and accountability at every stage. 8 𝙮𝙚𝙖𝙧𝙨 𝙤𝙛 𝙏𝙤𝙥 𝙍𝙖𝙩𝙚𝙙 𝙋𝙡𝙪𝙨 𝙙𝙤𝙚𝙨𝙣'𝙩 𝙝𝙖𝙥𝙥𝙚𝙣 𝙗𝙮 𝙖𝙘𝙘𝙞𝙙𝙚𝙣𝙩. If you're serious about building something that works - hit "Invite Now." Let's talk.

I am Akshdeep, a Senior Mobile App Developer who also builds the AI layer most app developers cannot. For 12+ years, I have been shipping Flutter, React Native, and native iOS/Android apps that are still running in production today. I build cross-platform apps in Flutter and React Native, and native apps in Swift/SwiftUI (iOS) and Kotlin/Jetpack Compose (Android), end to end from architecture through App Store and Play Store deployment. 𝐊𝐄𝐘 𝐌𝐈𝐋𝐄𝐒𝐓𝐎𝐍𝐄𝐒 🏆 Top Rated Plus, 100% Job Success Score 🏆 $300K+ earned on Upwork across 63 projects 🏆 12,000+ hours delivered on the platform 🏆 Apps shipped are still live in production today 𝐖𝐇𝐀𝐓 𝐈 𝐁𝐔𝐈𝐋𝐃 ✅ Flutter apps for iOS & Android ✅ React Native cross-platform apps ✅ Native iOS apps (Swift / SwiftUI) ✅ Native Android apps (Kotlin / Jetpack Compose) ✅ AI-powered mobile apps (OpenAI, Claude, Gemini integrations) ✅ On-demand, taxi & delivery apps ✅ Marketplace & e-commerce apps ✅ Fintech & payment-enabled apps (Stripe, PayPal, Razorpay) ✅ Healthcare & HIPAA-aware apps ✅ Real estate & property listing apps ✅ Social, dating & community apps ✅ SaaS & subscription-based apps ✅ Booking, logistics & on-demand service apps ✅ Real-time chat, video calling & streaming apps ✅ EdTech & e-learning apps ✅ Fitness & wellness apps 𝐖𝐇𝐘 𝐂𝐋𝐈𝐄𝐍𝐓𝐒 𝐏𝐈𝐂𝐊 𝐌𝐄 𝐎𝐕𝐄𝐑 𝐎𝐓𝐇𝐄𝐑 𝐌𝐎𝐁𝐈𝐋𝐄 𝐃𝐄𝐕𝐄𝐋𝐎𝐏𝐄𝐑𝐒 Most mobile developers stop at the frontend. I also build the AI and automation layer behind the app, including chatbots, voice agents, RAG-based search, and backend workflow automation with n8n, Make, and Zapier. So what you get is a working product with real intelligence built in, not just a UI wrapped around a static backend. 𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊 𝐌𝐨𝐛𝐢𝐥𝐞: Flutter, React Native, Swift, SwiftUI, Kotlin, Jetpack Compose 𝐀𝐈 & 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧: OpenAI, Claude API, Gemini, RAG systems, n8n, Make, Zapier 𝐁𝐚𝐜𝐤𝐞𝐧𝐝: Python, Node.js, REST APIs, GraphQL, Firebase, Supabase 𝐏𝐚𝐲𝐦𝐞𝐧𝐭𝐬: Stripe, PayPal, Razorpay, Apple Pay, Google Pay, In-App Purchases 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞: AWS, CI/CD, Push Notifications, App Store & Play Store Deployment 𝐄-𝐜𝐨𝐦𝐦𝐞𝐫𝐜𝐞: Shopify Plus, WooCommerce, Custom Storefronts 𝐖𝐇𝐀𝐓'𝐒 𝐈𝐍𝐂𝐋𝐔𝐃𝐄𝐃 ✅ Full App Store & Play Store submission, handled end to end ✅ 60–90 days of free post-launch support and bug fixes ✅ Full code and IP ownership handed over, no exceptions ✅ Clear, regular updates throughout the build, no vague status checks ✅ Backed by a team when a project needs more hands 𝐇𝐎𝐖 𝐈 𝐖𝐎𝐑𝐊 Right questions upfront. Clear updates throughout the build. If you are launching a new app or need to fix and scale an existing one, send me a brief description of what you are building. I will come back with a clear, honest plan, no vague estimates.

Mobile App Developer and Senior React Native Developer with 7+ years of experience building iOS apps, Android apps, SaaS mobile platforms, booking apps, marketplace apps, and on-demand mobile applications. I help founders, startups, and product teams turn app ideas into clean, scalable, production-ready mobile products with strong performance, smooth user experience, secure backend integrations, and App Store / Play Store launch support. I have shipped 32+ mobile apps across iOS and Android, including SaaS platforms, booking systems, fitness apps, EdTech apps, AI-powered mobile apps, marketplaces, and business management tools. 𝐑𝐞𝐬𝐮𝐥𝐭𝐬 𝐌𝐲 𝐀𝐩𝐩𝐬 𝐇𝐚𝐯𝐞 𝐒𝐮𝐩𝐩𝐨𝐫𝐭𝐞𝐝 → 32+ iOS and Android apps shipped → 42%+ average ROI within 6 months of launch → $750K+ in seed funding supported through investor-ready MVPs → 30%+ increase in bookings/downloads within the first month → Apps launched, improved, and maintained for real users and growing businesses 𝐖𝐡𝐚𝐭 𝐈 𝐁𝐮𝐢𝐥𝐝 → React Native mobile apps for iOS and Android → SaaS mobile apps and B2B mobile extensions → Booking apps for salons, wellness, fitness, healthcare, and service businesses → Marketplace apps with buyers, sellers, providers, customers, and admin flows → On-demand apps with geolocation, ETA tracking, in-app chat, and payments → AI-powered mobile apps with OpenAI, chat, voice, image, and automation features → MVP mobile apps from product planning to App Store and Play Store launch → Mobile app redesigns, bug fixing, performance optimization, and takeover projects 𝐂𝐨𝐫𝐞 𝐌𝐨𝐛𝐢𝐥𝐞 𝐅𝐞𝐚𝐭𝐮𝐫𝐞𝐬 → User authentication, onboarding, profiles, and role-based access → Push notifications, reminders, and real-time updates → In-app payments, subscriptions, Stripe, PayPal, and wallet flows → Calendar booking, staff availability, scheduling, and appointment management → Google Maps, location tracking, route logic, and service-area flows → Chat, messaging, media upload, reviews, ratings, and activity feeds → Offline mode, caching, background sync, and conflict handling → Admin dashboards, analytics, reporting, and backend management tools 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐒𝐭𝐚𝐜𝐤 𝐌𝐨𝐛𝐢𝐥𝐞: React Native, TypeScript, Expo, React Navigation, Redux, Context API, Reanimated 𝐁𝐚𝐜𝐤𝐞𝐧𝐝: Node.js, Express.js, Firebase, Supabase, REST APIs, Cloud Functions 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞: Firestore, PostgreSQL, MongoDB, Supabase 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬: Stripe, PayPal, Twilio, SendBird, WebRTC, Agora, Zoom SDK, Google Maps, OAuth 𝐃𝐞𝐩𝐥𝐨𝐲𝐦𝐞𝐧𝐭: Fastlane, GitHub Actions, AWS, Firebase, App Store, Google Play Store 𝐀𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬: OpenAI API, AI chat, AI voice, image processing, recommendation logic, and workflow automation 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬 𝐈 𝐁𝐮𝐢𝐥𝐝 𝐅𝐨𝐫 SaaS · Booking Apps · Marketplaces · On-Demand Services · EdTech · Fitness · Healthcare · Wellness · E-Commerce · Local Services · Business Apps 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞 I do more than write React Native code. I understand the product, user journey, business model, launch requirements, and long-term maintenance needs behind the app. You can expect realistic scoping, clear communication, weekly builds, testable APK/IPA delivery, clean architecture, performance-focused development, and support through App Store and Play Store submission. Whether you are building a new MVP, improving an existing mobile app, adding AI features, or taking over a React Native codebase that needs stability, I can help you move forward with clarity and execution. Send me a message with what you are building. I will review your goals, suggest the right technical path, and help you build a mobile app that is ready for real users and business growth.

🏆 Top Rated Plus 🏆 10+ years of experience 💡🧠 🛠️ crafting high-quality mobile solutions 💻📱 for iOS, Android, and Flutter. I don't just build apps, I architect 🎨 and lead the development of robust 💪🛡️, scalable software 📈 that solves real-world problems 🧩 and delivers exceptional user experiences 🌟. My Expertise: ✅ Flutter Architect: I've spearheaded successful migrations of native apps to Flutter, reducing development time and boosting performance. I'm proficient in building custom Flutter plugins, optimizing for web and mobile, and deeply understand Flutter's architecture and best practices. ✅ SDK & Plugin Development: I have a proven track record of creating multi-platform SDKs and plugins that streamline development and enhance functionality for other developers. My focus is on clean code, intuitive APIs, and seamless integration. ✅ Mobile-First Strategy: I'm passionate about creating mobile experiences that prioritize user engagement and satisfaction. I have a strong understanding of mobile design principles and UI/UX best practices. ✅ Technical Leadership: I've led teams, mentored developers, and fostered collaboration to deliver complex projects on time and within budget. I'm a certified Scrum Master with experience in Agile methodologies. My Skills: ✅ Languages: Swift, Objective-C, Java, Kotlin, Dart, C/C++, C# ✅ Platforms: Flutter, iOS, Android, Web ✅ Tools: Xcode, Android Studio, Git, CocoaPods, Firebase, RESTful APIs, GraphQL, MQTT, BLE, NFC ✅ Methodologies: Agile, Scrum, Mobile-First Design, Clean Architecture, SOLID Principles 🤝 Let's Collaborate! 🤝 I'm eager to apply my skills and experience to your next project. Whether you need a Flutter expert, a Mobile developer, an SDK developer, or a technical leader to guide your team, I'm ready to deliver results that exceed your expectations.

✅ 13 Years Professional Experience ✅ 40+ Mobile Apps ✅ Top Rated Plus Developer Hey there! 👋 I'm Sherwin, an expert Engineer with 13+ years of experience at big tech companies. I'm experienced leading, designing and implementing core mobile features in fast-paced, technology-driven environments with worldwide impact and multiple stakeholders. I am fluent in English and have experience working with scalable and testable code, REST APIs, multiple design patterns, CI/CD pipelines and version control. 🏆 Worked in the multinational company MicroStrategy, Developed apps with over 100 million daily users such as DiDi and Kuaishou before. 🚀 Expertise in Technologies: o Native Development: Swift, SwiftUI, Objective-C, Kotlin, Java, Jetpack Compose, HarmonyOS o Cross-Platform Frameworks: React Native , Flutter o DataBase: Realm, CoreData, Firebase FireStore, Firebase Realtime Database, Supabase, RoomDatabase o Web: Flutter Web o Deploy: AWS S3, Lamda, CloudFront, EC2, OpenShot o Server Development: Python, TS ✅ My experience domains: o AI Agent o Bluetooth / Smart Watch / Camera Domain o Fitness / Health Domain o OpenAI / Assistance / Whisper o Location Tracking / Travel o Social Media/Dating Domain/Video/Audio chats o Video/Audio player processing application o Financial / Shopping Domain o Payment / In App Purchase / Apple Pay / Stripe I'm excited to bring my experience and skills to new projects and deliver high-quality work on time and within budget. Let's make great apps together! Regards, Shaolin

⭐𝗙𝗿𝗲𝗲 𝗔𝗽𝗽 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 𝗥𝗲𝘃𝗶𝗲𝘄 & 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝗦𝘂𝗴𝗴𝗲𝘀𝘁𝗶𝗼𝗻𝘀 If you’re looking for a reliable Flutter mobile app developer who can turn your idea into a scalable, high-performance Android & iOS app, you’re in the right place. Many startups and businesses struggle with slow apps, poor UI/UX, unscalable Firebase setups, or unreliable developers who disappear mid-project. I solve these problems by delivering clean architecture, production-ready Flutter applications that are aligned with your business goals, not just code. I specialize in cross-platform mobile app development using Flutter, helping founders, startups, and agencies launch apps that are fast, secure, and user-friendly. ➤ 𝗪𝗵𝗮𝘁 𝗜 𝗛𝗲𝗹𝗽 𝗬𝗼𝘂 𝗔𝗰𝗵𝗶𝗲𝘃𝗲 ➤ Launch Android & iOS apps faster with one Flutter codebase ➤ Build scalable apps using Firebase & REST APIs ➤ Improve UI/UX for higher user retention ➤ Integrate AI features like ChatGPT & image analysis ➤ Fix bugs, performance issues & app crashes ➤ Turn Figma/UI designs into pixel-perfect Flutter apps ➤ 𝗠𝘆 𝗖𝗼𝗿𝗲 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀 ➤ Flutter App Development (Android & iOS) ➤ Firebase Authentication, Firestore & Realtime Database ➤ REST API & Backend Integration ➤ AI / ChatGPT API Integration ➤ App Optimization & Error Fixing ➤ UI/UX Implementation & Animations ➤ App Deployment & Store Submission ➤ 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲 ➤ Certified Flutter Developer with real production experience ➤ 5⭐ rated projects with excellent client feedback ➤ Clean, maintainable & scalable code ➤ Clear communication & fast response time ➤ Long-term support mindset, not just task completion ➤ Strong understanding of startup & business needs ➤ 𝗧𝗼𝗼𝗹𝘀 & 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀 ➤ Flutter & Dart ➤ Firebase (Auth, Firestore, Realtime DB, Cloud Functions) ➤ REST APIs & JSON ➤ AI APIs (ChatGPT, Image Analysis) ➤ GitHub & Version Control ➤ FlutterFlow ➤ Figma to Flutter ➤ Laravel (Backend Support) ➤ 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 𝗜’𝘃𝗲 𝗪𝗼𝗿𝗸𝗲𝗱 𝗪𝗶𝘁𝗵 ➤ E-commerce ➤ AI & Machine Learning Apps ➤ Education & Learning Apps ➤ Productivity & Habit Tracking ➤ Business & Startup Applications I think smart, build fast, and scale with purpose. let’s work together. Flutter Developer, Mobile App Developer, Android App Development, iOS App Development, Firebase Developer, Cross Platform Apps, Flutter Firebase, AI Mobile App, ChatGPT Integration, App UI UX, FlutterFlow, REST API Integration, Startup App Development, MVP Development, App Optimization, Bug Fixing, Scalable Mobile Apps, Dart Developer, Full Stack Mobile Developer, Firebase Firestore, Firebase Realtime Database, Mobile UI Design, App Performance, Flutter Expert, Hybrid Mobile Apps, App Deployment, Google Play Store, Apple App Store, Flutter Consultant

Lead Mobile Engineer | iOS • Android • Flutter | Product & Architecture Expert I help startups and growing companies build, scale, and modernize mobile products. Over the last 12+ years, I've delivered production mobile applications across fintech, health, education, lifestyle, and marketplace industries. I specialize in taking ownership of the entire mobile platform—from technical architecture and feature planning to App Store and Play Store releases. Whether you need a new app, an experienced engineer to rescue an existing project, or a technical partner to lead your mobile development, I can help. What I can help you with • Build iOS and Android apps from scratch • Flutter cross-platform development • Native iOS development (Swift, SwiftUI, UIKit, Objective-C) • Mobile architecture (MVVM, modularization, scalable codebases) • AI feature integration (OpenAI, LLMs, AI-powered experiences) • REST & GraphQL APIs • Firebase, RevenueCat, Stripe, Push Notifications • Performance optimization and crash reduction • Code reviews and technical audits • Modernizing legacy applications • Publishing and maintaining apps on the App Store & Google Play Why clients work with me ✔ 12+ years of commercial experience ✔ Lead-level ownership of mobile products ✔ Strong communication with founders, product managers, designers, and backend teams ✔ Clean, maintainable, production-ready code ✔ Able to quickly understand existing codebases and deliver new features with confidence ✔ Experience as the sole mobile engineer responsible for both iOS and Android applications If you're looking for someone who can do more than just write code—someone who can own your mobile product and help make technical decisions—I'd love to discuss your project.