I’m a Mobile App Developer and a Flutter Developer specializing in AI-powered mobile apps developed for real-world performance and production reliability. My work sits at the intersection of mobile engineering, cross-platform development, and AI-enabled applications, with a strong emphasis on performance, scalability, and long-term maintainability. As a Mobile App Developer, I take full ownership of applications from concept to deployment, ensuring smooth user experiences backed by stable, well-structured code. I build cross-platform apps using both Flutter and React Native, allowing me to choose the right tool based on product needs, performance requirements, and long-term scalability. This flexibility helps deliver high-quality mobile experiences across iOS and Android without unnecessary trade-offs. As a Flutter Developer, I specialize in building responsive, scalable, and visually polished applications using a single, cohesive codebase. I focus on clean UI architecture, reusable components, and efficient state management while maintaining performance close to native standards. As an AI Mobile App Developer, I integrate intelligent features directly into mobile applications in a practical and production-focused way. Rather than treating AI as an add-on, I design systems where AI enhances core functionality, whether through personalization, automation, data processing, or LLM-powered features. I focus on building AI workflows that are reliable, observable, and cost-efficient. In my day-to-day work, I design and develop mobile applications that connect with modern backend systems, APIs, and third-party services. I collaborate closely with backend teams or independently handle integrations to ensure that mobile apps operate as part of a cohesive, scalable system. This includes authentication, real-time data flows, offline support, and performance tuning. As a Mobile App Developer working across Flutter, I support full product development cycles, including: ➡️ app architecture and technical planning ➡️ UI/UX implementation focused on usability and responsiveness ➡️ API integration and data handling ➡️ performance optimization and debugging ➡️ app store deployment and post-launch iteration A significant portion of my work involves building: ➡️ cross-platform mobile apps for startups and SaaS products ➡️ internal tools and mobile-enabled dashboards ➡️ user-facing applications with real-time features and dynamic data ➡️ AI-powered mobile features such as chat interfaces, recommendations, and automation When working as an AI Mobile App Developer, I often implement: ➡️ LLM-powered chat and assistant features ➡️ AI-driven personalization and recommendations ➡️ intelligent data processing within mobile workflows ➡️ integrations with external AI services and APIs Clients typically work with me when they need: ➡️ a Mobile App Developer who can deliver end-to-end applications ➡️ a Flutter Developer depending on project needs ➡️ an AI Mobile App Developer who can integrate AI into real products ➡️ mobile apps connected to scalable backend systems and APIs ➡️ MVPs that can evolve into production-grade mobile platforms ➡️ clean, maintainable codebases designed for long-term growth My core work as a Mobile App Developer, Flutter Developer covers: ➡️ cross-platform app development using Flutter ➡️ scalable app architecture and state management ➡️ API integration and backend connectivity ➡️ performance optimization, testing, and debugging ➡️ AI feature integration where it adds real value I regularly work on MVPs and early-stage mobile products with a strong focus on building solid foundations that can scale. Whether working independently or alongside a broader team, I prioritize clarity, reliability, and thoughtful system design. Long-term success in mobile applications comes from balancing user experience with technical strength. I focus on building apps that are not only polished and intuitive, but also stable, scalable, and ready for real-world growth.

I help startups and businesses build Flutter & React Native mobile apps for iOS and Android — from idea to App Store and Play Store launch — with clean code, clear communication, and reliable delivery. I specialize in end-to-end Flutter and React Native app development — handling everything from architecture and UI to backend APIs, Firebase integration, testing, and deployment to App Store and Play Store. What I can help you with- ✅ Flutter & React Native mobile app development (iOS & Android) ✅ Swift (iOS) and Kotlin (Android) native app development ✅ Firebase, REST API & third-party integrations (Twilio, Google Maps, Push Notifications, Social Login, In-App Purchases) ✅ MVP development for startups — from wireframe to live app ✅ Backend systems with Node.js, Laravel, or custom APIs ✅ Performance, security, and scalability improvements My approach- ✅ Clear requirements & realistic timelines ✅ Clean, maintainable architecture ✅ Regular updates & transparent communication ✅ Long-term thinking, not quick hacks Industries & platforms I've worked on 👇 Mobile Apps (Flutter / React Native / Swift / Kotlin): Food delivery, taxi booking, health & fitness, education, e-commerce, social apps, music, restaurant management Web & Software Platforms: ERP, CRM, inventory systems, POS, booking platforms, marketplaces, real estate, SaaS products I've worked on 100+ projects, helping clients turn ideas into stable, production-ready apps that are easy to maintain and scale. If you're looking for a developer who takes full ownership of your product through the complete mobile app development lifecycle — let's talk. All discussions are kept confidential and can be covered under NDA.

Are you looking for a Mobile app developer who can design and develop your app for the next millions of users? ARE YOU - Looking for a mobile app development service starting from the design, development to release and publish a mobile app to Play Store and App Store for mobile app users/customers. - Looking for a mobile app developer who can integrate new features into your existing Android app, iOS app or Flutter app based projects? - Individual | Big company | Startup who wants to build and create Android app or iOS app from scratch? - Looking for a mobile app developer who can transform your idea into reality? - Someone who invests in the best so you get better results? If any of that is what you need, message me and I am here to help you. Who am I? - I'm Sagarkumar Surani, a Senior Mobile App Developer with 10+ years of experience and a Master’s degree in Computer Science and Engineering. - I worked with big brands, startups and individuals to create mobile apps for their requirements. My work also got featured a few times in the market store. Apps developed by me have 80 million+ downloads on store and users love to keep the app on their phone as a permanent app. - I’ve worked with clients from over 40 countries, such as the USA, UK, Germany, India, and Australia, which has given me a strong understanding of different international markets. My experience covers a variety of industries, including Travel and Tourism, train ticket booking, transport, educational, hospitality, health & wellness, real estate, live streaming, Marketplace, food & delivery, human resources, fitness, financial & banking sectors, e-commerce, dating, sports, Betting, music/audio, and automotive. I specialize in these high-quality Mobile App Design and Development areas: - Android app development - Kotlin, Java, Android SDK, Android Studio - iPhone app development - Swift, SwiftUI, Objective C, iOS SDK, Xcode - Backend Development | Node.js - Cross Platform Mobile App Development using Flutter, Dart - UI/UX: Mobile design - Mobile & Web app design - UX/UI design - Landing page design Skills : - Have experience developing, releasing & maintaining applications as a Mobile app developer - Strong skills in executing pixel & animation perfect UI's relative to good app performance - Have great communication skills and ability to work with your team - Have a great understanding of MVC, MVP, MVVM and take great care to ensure each project is well-architecture with best practices and easily maintainable so it can be enhanced as feature grows. - The ability to take initiative and work independently with very little supervision - Application requirement analysis - Translating requirements to technical languages In addition to Mobile app development services, my topic areas of expertise include: - Mobile Application Architect - Native Mobile Application Development consultation - Mobile Application UI/UX design using Figma, Adobe XD - Mobile Application backend services Firebase, AWS Mobile Hub - Mobile Application backend development: Node, Express, TypeScript, JavaScript, MongoDB, MySQL, PHP, RESTful API development, Google App Engine - Website development, Web Scraping, Web Admin Panel, CMS Development - Chatbot development, Facebook Messenger If you still think this is right for you, contact me. Thank you in advance for your time and consideration. Kind Regards Sagarkumar Surani P.S. - When you work with me your satisfaction is 100% guaranteed. - Every person who ever worked with me got results. EVER! - Even if you don’t hire me now, keep my profile link in case you need a Mobile App Developer later. FAQ Q: Can you provide maintenance support after development? A: Yes, I provide free of cost maintenance support for 6 months after mobile app development. Q: Can you help with Mobile app design? A: Yes, I offer a Mobile app UX design as an additional service. Q: Can you help with the landing page website for my mobile app product? A: Yes, I can help to build the landing page for a mobile app product. Warmly, Sagarkumar Surani ----------------------------------------------------- Native Android App Developer, iOS App Developer, Cross-Platform Flutter App Developer, Top Flutter Developer, React Native, Hire Best MERN Stack Developer, RESTful API Developer, API Integration, Frontend Developer, React.js, Backend Developer, Nodejs, Javascript, Figma, UI/UX Design, Prototype, In-app purchases, Location, Payment Gateway Integration, Apple Xcode, Android Studio, Push notifications, User authentication, User profile creation, QA, Unit Testing, Regression Testing, Dating App, Ecommerce App, RevenueCat, Adapty, 3rd Party SDK Integration, SQLite, MySQL, Firebase Cloud Firestore, Realtime Database, Kotlin, Swift, Java, Dart, SwiftUI, Twilio, Mapbox, HealthKit, Google Analytics, Amazon Web Services, DigitalOcean, Core Data, UIKit, MapKit, Phone, Full Stack Developer, iPad, OpenAI ChatGPT LLM, ChatGPT API Integration .

🚀 The Top 3% of Talent in Mobile & AI-Powered Product Development 🤖 AI-Driven Mobile Engineer Building Apps That Scale Beyond MVP ⚡ AI-Assisted Engineering for Faster Delivery & Higher Product Quality 👉 WHAT YOU GET ✔️ Full Stack Mobile Developer - 22+ years experience, 2000+ builds, $700K+ client impact, end-to-end development ownership. ✔️ React Native Mobile App & Flutter Developer - 100+ interfaces, 18–27% user engagement lift, clarity and ultimate trust. ✔️ Mobile Application Developer - 30–40% faster launch cycles, cleaner UI/UX, stronger user retention across SaaS Mobile App ecosystems. 👉 ACHIEVEMENTS ✔️ 22+ years, 40,000+ hours, 2000+ products delivered as a full stack mobile developer, mobile app developer, and senior full stack developer ai and mobile application developer workflows. ✔️ $700K+ client impact, $900K+ direct revenue, 200+ successful MVPs, £11M annual business volume generated as a top-performing mobile app development expert. ✔️ 100,000+ active users where a custom react native mobile app developer execution lifted repeat engagement by 27% on a popular festival companion app. ✔️ 10,000+ users in Healthcare Platform and HIPAA-compliant systems where mobile application developer architecture cut clinical data friction by 40% using an intuitive doctor directory website interface. ✔️ 2,423 completed mobile orders, 34% faster handling in E-commerce Marketplace App and Fintech Platform deployments as a full stack developer. ✔️ 90% faster background sync, 80% lower crash workload, 65% fewer endpoint errors through API Integration, automated Stripe integration, and Flutter developer performance fixes. ✔️ 5–8 weeks shorter Startup MVP to Pilot Launch, 35% fewer critical production bugs through legacy code refactoring and clean continuous development pipelines. 👉 WHERE I DELIVER ✔️ As a mobile app developer - 200+ systems with pixel-perfect mobile app design, automated push notifications, and UI/UX design and development across SaaS Mobile App and Enterprise Mobile App architectures. ✔️ As an experienced mobile app developer - 15+ years of cross-platform engineering, delivering 30–40% faster iteration cycles for teams that need both iOS and Android apps from scratch. ✔️ As a full stack developer - 50+ end-to-end mobile + web platform setups with secure Node.js backend architecture, REST API deployment, and database scaling from Early-Stage MVP to live production. ✔️ As a react native mobile app specialist - building responsive mobile app react native mobile components for cross-platform app deployment, ensuring native-like feel across both iOS and Android. ✔️ As an AI App developer & AI Developer - leveraging cutting-edge ai platform development, ai development, and ai mobile development to build smart assistants, audio transcription apps, and image/vision processing products. ✔️ As a backend developer and javascript developer - writing highly maintainable server code in Node.js, Express, NestJS, and PHP (Laravel) with robust database integration via MongoDB, PostgreSQL, and Firebase/Supabase. ✔️ As a full stack mobile developer - driving ongoing support and maintenance, optimizing systems to fix bugs and improve performance with a dedicated team mindset. 👉 INDUSTRY IMPACT ✔️ Marketplace App & E-commerce - thousands of item listings, 20%+ higher checkout conversion as a mobile application developer and full stack developer. ✔️ Healthcare Platform & Telehealth - clinic workflows, 25%+ better data processing security as a senior mobile app developer. ✔️ AI Mobile App & AI Platform Development - OpenAI & Claude API smart integrations, automated recommendations, and custom conversational interfaces as an AI App developer. ✔️ Fintech Platform & SaaS Mobile App - secure in-app purchases, mobile subscriptions, multi-role access control, and seamless Stripe payment integrations. ✔️ Enterprise Mobile App & Workflow Automation - customized real-time chat, location-tracking (GPS/Google Maps), and mobile app + admin panel management tools. 👉 HOW I BUILD ✔️ 22+ years as a mobile app developer: built with cross-platform and native ecosystems using Swift, Kotlin, Java, Flutter, React Native, and native app infrastructure optimized for smartphone form factors. ✔️ 15+ systems as a full stack developer: powered by Node.js, Express, NestJS, PHP (Laravel), TypeScript, REST API protocols, GraphQL, Firebase, Supabase, Firestore, PostgreSQL, and MongoDB. ✔️ 40+ products engineered with a dedicated team mindset: utilizing clean Git version control, secure AWS cloud envicloud environments, Docker containers, and rigorous usability testing to publish app to App Store and Google Play smoothly. Looking for an elite Senior Mobile & Full Stack Developer who can build an app from scratch, create a mobile application with premium UX, or handle complex product development for long-term collaboration? Let's connect! Send an invite and let’s talk about your project goals. ☎️

I help founders ship production mobile apps, Flutter, native iOS, and native Android, from MVP to App Store launch, and implement AI integrations and solutions, including LLMs, RAG, computer vision, and automation, when the product needs them. 𝗧𝗼𝗽 𝗥𝗮𝘁𝗲𝗱 𝗣𝗹𝘂𝘀 | 𝟳,𝟬𝟬𝟬+ 𝗵𝗼𝘂𝗿𝘀 | 100% Job Success | 11+ years I’ve shipped 40+ production apps across: → Secure fintech & banking applications → AI-powered systems (computer vision, LLM agents, automation) → Scalable SaaS platforms with full backend I also build with AI coding agents (Claude Code, Cursor, Copilot) daily, with the engineering judgment to catch what they get wrong. 𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸-𝗮𝗴𝗻𝗼𝘀𝘁𝗶𝗰. I pick the right stack for your product, not what I prefer. Currently building my own SaaS, so I focus on clean architecture and long-term growth, not quick hacks. ━━━━━━━━ 𝐏𝐫𝐨𝐝𝐮𝐜𝐭𝐬 𝐈'𝐯𝐞 𝐡𝐞𝐥𝐩𝐞𝐝 𝐛𝐮𝐢𝐥𝐝: Zand Corporate: the mobile app for the UAE's first fully digital corporate bank. Built from scratch through App Store approval. DTEK Swift: AI-powered self-checkout using computer vision to recognize products in under 200ms. now rolling out across ADNOC Distribution stores in the UAE. Easypaisa and My Telenor: Core developer on consumer apps now at 𝟭𝟬𝟬𝗠+ and 𝟱𝟬𝗠+ downloads. 𝐖𝐡𝐚𝐭 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐒𝐚𝐲 💬 "Hammad was incredible to work with. He jumped in quickly, handled everything with professionalism and timely communication. I feel 𝐥𝐮𝐜𝐤𝐲 𝐭𝐨 𝐡𝐚𝐯𝐞 𝐟𝐨𝐮𝐧𝐝 𝐡𝐢𝐦 and will definitely be hiring him for future projects!" Waheeda B 💬 "Hammad took my existing mobile application to a whole new level. His quality of work is seriously top notch. New code was pushed out almost everyday for me to test. 𝐁𝐨𝐨𝐤 𝐡𝐢𝐦 𝐭𝐨𝐝𝐚𝐲...you wont regret it." Thomas R 𝐖𝐡𝐚𝐭 𝐈 𝐒𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐳𝐞 𝐈𝐧 Mobile Apps (Cross-Platform & Native): Flutter, React Native, native iOS (Swift), native Android (Kotlin). Clean architecture, BLE/WiFi/IoT, camera, health data, file system, calendar integrations. AI App Development: OpenAI/ChatGPT, Anthropic Claude, Google Gemini, custom RAG pipelines, AI chat, voice agents, prompt engineering, computer vision, on-device ML, agentic workflows. Backend & Cloud: Supabase, Firebase, REST & GraphQL, PostgreSQL, Airtable, Azure, Google Cloud, Node.js, C#, Python. Payments: RevenueCat, Stripe, Apple IAP, Google Play Billing. Subscriptions, trials, receipt validation, secure monetization. AI-Assisted Development: Claude Code, Cursor, Copilot. Orchestrated daily, with the judgment to review and override AI output. Other: CI/CD (GitHub Actions, Codemagic, Azure DevOps, Fastlane, Jenkins), JWT and OAuth, SaaS architecture, RBAC, multi-tenant systems, WebSockets, MQTT, App Store and Google Play submission, review handling and release. 𝐖𝐡𝐚𝐭 𝐘𝐨𝐮 𝐆𝐞𝐭 → Apps for iOS, Android & Web → MVPs in 4 weeks, delivered on time → Clean Architecture & SOLID principles built to scale → Security-focused development, no shortcuts → Daily updates, working builds to test throughout → Founder-first mindset. I solve business problems, not just technical ones → Full-cycle support from idea to launch and beyond → NDA-friendly, fluent English, 40 hrs/week availability 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬 𝗦𝗲𝗿𝘃𝗲𝗱 🔸 B2B SaaS & Subscription Platforms 🔸 AI-Powered & Data-Driven Products 🔸 Startups & Funded Early-Stage Companies 🔸 Fintech & Payment-Enabled Apps 🔸 HealthTech & Wellness Platforms 🔸 Marketplaces & On-Demand Services 🔸 E-commerce & Retail 🔸 Industrial Automation & IoT ✌ 𝗦𝗢𝗨𝗡𝗗 𝗟𝗜𝗞𝗘 𝗔 𝗙𝗜𝗧? Message me with a brief overview. I'll review and tell you honestly if and how I can help. No fluff. 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀: Mobile App Development, iOS App Development, Android App Development, Swift, Kotlin, React Native, Flutter, Dart, Cross-Platform App Development, Hybrid App Development, Native App Development, AI App Development, AI Integration, OpenAI API, ChatGPT, Anthropic Claude, Google Gemini, LangChain, RAG, Computer Vision, Machine Learning, On-Device ML, Agentic Workflows, Voice Agents, Chatbot, Firebase, Supabase, PostgreSQL, REST API, GraphQL, Node.js, Python, C#, Azure, Google Cloud, Stripe, RevenueCat, In-App Purchases, Apple IAP, Google Play Billing, Subscription, Paywall, Mobile Paywall, JWT Auth, RBAC, Multi-Tenant, SaaS, MVP, Enterprise Mobile App, Custom App Development, Full-Stack Mobile, Solution Architect, Clean Architecture, MVVM, BLE, IoT, WebSockets, MQTT, Realm, CoreData, SignalR, Push Notifications, Real-Time Messaging, Text to Speech, API Integration, Payment Integration, SDK Integration, Printer SDK, Offline-First, State Management, App Store Deployment, TestFlight, CI/CD, GitHub Actions, Codemagic, Fastlane, Jenkins, Azure DevOps, Unit Testing, Code Review, Code Optimization, UI/UX Design, Figma, FlutterFlow, Cursor, Android Studio, XCode, Vibe Coding, MVP Development, AI App Development, Full-Stack App Development, Twilio, AppsFlyer.

Today, mobile apps are not just side projects. Many founders are turning simple subscription, booking, fitness, marketplace, and service-based app ideas into real recurring-revenue products. A $50K MRR product does not start with a complex app. It usually starts with a clear problem, a focused MVP, smooth user experience, and the right technical foundation. That is where I help. I am a Flutter Mobile App Developer with 7+ years of experience building iOS and Android apps for startups, businesses, and product teams. I help clients turn app ideas into clean, scalable, and launch-ready mobile products. Over the years, I have worked on mobile apps and digital products across marketplaces, booking platforms, logistics, fitness, entertainment, e-commerce, fleet management, and campaign-based applications. Some of my notable work includes: • Share a Coke Campaign, Coca-Cola A mobile-to-billboard campaign experience where users could interact through mobile and see their names displayed on digital outdoor screens. • Stic`car FIFA Trophy Campaign App 2018 A mobile app based fleet management and On-Vehicle Advertising project for FIFA Trophy campaign vehicles. The system tracked campaign vehicles carrying branded stickers and showed movement, visibility, estimated views, and heat map analytics on the dashboard. • Enjoylive A live entertainment and social mobile app with 10K+ users. • Dashng A rental marketplace app for cars and boats, built with a smooth renter experience, listing flow, search, categories, booking direction, and modern mobile UI. I hold a BS in Computer Science from the University of Central Punjab and have spent my career working closely with product owners, startups, agencies, and businesses to build mobile apps that are practical, scalable, and easy to use. My Flutter mobile app development expertise includes: • Flutter app development for iOS and Android • Clean, responsive, and modern mobile UI • Firebase Authentication, Firestore, Storage, FCM, and Analytics • REST API integration • Payment gateway integration • Push notifications • Maps and location-based features • Chat and real-time features • Booking, marketplace, e-commerce, fitness, and SaaS app flows • App Store and Google Play deployment • Bug fixing, performance improvement, and app maintenance I can help you with: • MVP development • Complete mobile app development • Flutter app redesign • Existing app improvement • Firebase-based apps • API-based mobile apps • App launch and deployment support My goal is not just to write code. My goal is to help you build a mobile app that works smoothly, looks professional, and gives your users a reason to come back. If you are planning to build a Flutter mobile app for iOS and Android, send me a message and let’s discuss your idea.

Are you looking for a Mobile App Developer who can design and develop your app for the next millions of users? ✅ ARE YOU 📱 Looking for a mobile app development service starting from design and development to deployment on the Play Store and App Store? 🔧 Looking for a mobile app developer who can integrate new features into your existing Android app, iOS app, React Native app, or Flutter project? 🏢 An individual, startup, or company looking to build a mobile application from scratch? 💡 Looking for a mobile app developer who can transform your idea into reality? ⭐ Someone who values quality, reliability, and long-term success? If any of that is what you need, message me and I am here to help you. 👨‍💻 Who Am I? • I'm Muhammad Hassan Saleem, a Senior Mobile App Developer with 10+ years of experience in mobile application development. • I have worked with startups, businesses, and entrepreneurs worldwide to create high-quality mobile applications tailored to their requirements. • I have successfully delivered mobile applications for clients across 20+ countries, including the USA, UK, Germany, Canada, Australia, UAE, and many others. • My experience covers a wide range of industries including Travel & Tourism, Transport, Education, Hospitality, Health & Wellness, Real Estate, Live Streaming, Marketplace, Food Delivery, Human Resources, Fitness, Financial Services, E-commerce, Sports, Music/Audio, Automotive, and AI-powered applications. 📲 I Specialize in These High-Quality Mobile App Design and Development Areas ✅ Android App Development ✅ Kotlin, Java, Android SDK, Android Studio ✅ iPhone App Development ✅ Swift, SwiftUI, Objective-C, iOS SDK, Xcode ✅ Backend Development | Node.js ✅ Cross-Platform Mobile App Development using Flutter & Dart ✅ Cross-Platform Mobile App Development using React Native ✅ Mobile UI/UX Design ✅ Mobile & Web App Design ✅ UX/UI Design ✅ Landing Page Design Skills ✔ Extensive experience developing, releasing, and maintaining mobile applications ✔ Expert in Flutter and React Native cross-platform mobile app development ✔ Strong skills in building pixel-perfect and animation-rich user interfaces while maintaining excellent app performance ✔ Experience building scalable Android and iOS applications using Flutter, React Native, Kotlin, Java, Swift, and SwiftUI ✔ Excellent communication skills and ability to collaborate with teams effectively ✔ Deep understanding of MVC, MVP, MVVM, and Clean Architecture principles ✔ Ability to take initiative and work independently with minimal supervision ✔ Application requirement analysis ✔ Translating business requirements into technical solutions ✔ Performance optimization and scalable application architecture In Addition to Mobile App Development Services, My Expertise Includes ✅ Mobile Application Architecture ✅ Native Mobile Application Development Consultation ✅ Mobile Application UI/UX Design using Figma ✅ Mobile Backend Services (Firebase, AWS) ✅ Backend Development using Node.js, Express.js, TypeScript, JavaScript, MongoDB, MySQL, PHP ✅ RESTful API Development & Integration ✅ Website Development ✅ Web Admin Panel & CMS Development ✅ AI Chatbot Development ✅ OpenAI & ChatGPT Integration If you still think this is right for you, contact me. Thank you in advance for your time and consideration. Kind Regards, Muhammad Hassan Saleem 🌟 P.S. • When you work with me, your satisfaction is my top priority. • I focus on delivering high-quality results and building long-term relationships with clients. • Even if you don't hire me today, feel free to save my profile for future mobile app development needs. ❓ FAQ Can you provide maintenance support after development? ✅ Yes, I provide ongoing maintenance and support after project completion. Can you help with Mobile App Design? ✅ Yes, I offer complete Mobile App UI/UX Design services as well. Can you help with a landing page website for my mobile app product? ✅ Yes, I can build a professional landing page for your mobile application. 🔑 Specializations Flutter Developer, React Native Developer, Native Android App Developer, iOS App Developer, Cross-Platform Mobile App Developer, Mobile App Developer, RESTful API Developer, API Integration, Frontend Developer, Backend Developer, Node.js Developer, JavaScript Developer, Figma, UI/UX Design, Prototype Design, In-App Purchases, Location Services, Payment Gateway Integration, Apple Xcode, Android Studio, Push Notifications, User Authentication, User Profile Creation, QA Testing, Unit Testing, Regression Testing, Ecommerce App, Marketplace App, RevenueCat, Adapty, Third-Party SDK Integration, SQLite, MySQL, Firebase Cloud Firestore, Realtime Database, Kotlin, Swift, Java, Dart, SwiftUI, Twilio, Mapbox, HealthKit, Google Analytics, Amazon Web Services (AWS), AI Mobile app developer

I help startups and enterprises transform ideas into high-performance, scalable mobile applications that users love and businesses rely on. With 10+ years of hands-on experience in iOS and Android development, I specialize in building secure, user-centric, and production-ready mobile apps from MVP to enterprise scale. My background in Agile project leadership ensures smooth execution, transparent communication, and on-time delivery. Mobile Development Expertise iOS Development • Swift • watchOS, SiriKit, HealthKit • Apple Watch integrations • App Store deployment & optimization Android Development • Kotlin • Flutter & React Native (cross-platform) • Google Play deployment Wearables & IoT • Fitbit, Garmin, Polar • BLE (Bluetooth Low Energy) integrations • Smart medical devices (BP monitors, Spirometers, Digital Stethoscopes) Backend & Cloud Integration • Node.js, PHP • REST & SOAP APIs • Firebase • AWS & Azure cloud services • Real-time systems (WebRTC, XMPP, VoIP) • JSON / XML integrations I ensure secure, scalable architecture aligned with HIPAA, GDPR, and PIPEDA compliance when handling sensitive user data. Industry Experience -HealthTech & Telehealth -Femtech -Women wellness -Female Helathcare -Fitness & Wellness Platforms -Mental Health Apps -PropTech Solutions -FinTech Applications -Workflow & Enterprise Systems (CRM, ERP, POS, Supply Chain) -Multi-Vendor E-commerce & On-Demand Platforms From custom workflow automation tools to large-scale consumer apps, I focus on performance, security, and seamless UX. Tools & Workflow • Agile (SCRUM, Kanban, Hybrid) • JIRA, Trello • GitHub, Bitbucket • CI/CD & Version Control Best Practices My Agile background allows me to manage development cycles efficiently, reduce technical debt, and maintain clarity between business goals and technical execution. What You Can Expect Working With Me -Clean, scalable, maintainable code -Clear milestones & proactive communication -Performance-optimized architecture -Strict data security standards -Long-term technical partnership mindset If you’re looking for a reliable senior mobile developer who understands both technology and business impact, let’s build something powerful together. less

🅷🅴🆈 👋 I’m a senior mobile app developer with 25 years of experience building high-performance Android & iOS apps, cross-platform solutions with Flutter, and mobile-first platforms that scale across millions of users. I specialize in native iOS (Swift, SwiftUI, Objective-C) native Android (Kotlin, Java), as well as Flutter, React Native, and Kotlin Multiplatform Mobile (KMP) - delivering elegant, stable, and maintainable mobile apps from the ground up. I’ve built 700+ apps across 20+ industries, from social networks and fintech to healthcare and smart IoT. My apps have ranked in the top charts, driven 80% user engagement increase, and reduced crash rates by up to 70%. I bring deep expertise in mobile architecture, native UI/UX implementation, performance optimization, device-level integration (BLE, GPS, sensors), CI/CD pipelines, and App Store / Google Play delivery. 🏆 Why Clients Choose Me ✔️ 25 years of hands-on experience in mobile development ✔️ 700+ mobile apps shipped across Android, iOS, Flutter & React Native ✔️ Reduced crash rate by 70% and improved app speed by 50% on key projects ✔️ Proficient in full mobile stack - UI, business logic, APIs, storage & deployment ✔️ Delivered cross-platform apps used by 5M+ users worldwide ✔️ Led app modernization projects that cut legacy codebase by 40% ✔️ Built KMP-based solutions for unified Android/iOS delivery and faster release cycles ✔️ Experience working with startups, enterprises, and Fortune 500s 📱 Native Mobile Development (iOS & Android) - Native Android apps with Kotlin, Java, Jetpack Compose, Material Design 3 - Native iOS apps with Swift, Objective-C, SwiftUI, UIKit, Combine - Extensive work with platform SDKs, sensors, cameras, biometrics, and BLE - Modular and scalable architecture: MVVM, Clean Architecture, VIPER - App Store & Google Play deployment, TestFlight & Firebase testing - Dependency injection, Jetpack libraries, Swift Package Manager, CocoaPods - Reduced app launch time by 50% through UI/threading optimization - Built multi-language apps with full localization and accessibility support 🔁 Cross-Platform Mobile Development - Flutter (Dart) for beautiful, performant mobile UIs across iOS and Android - React Native with custom native module bridging (Java/Obj-C) - Kotlin Multiplatform Mobile (KMM) to share business logic between platforms - Cross-platform codebases reduced development time by 40–60% - Custom platform views, adaptive UI layouts, and native plugin integrations - Delivered consistent performance & UX across devices 🔧 Backend & API Integration - Firebase (Auth, Firestore, Realtime DB, Cloud Functions, Analytics, Crashlytics) - RESTful API & GraphQL integration, token management, caching - Offline sync & local storage: Room, SQLite, Core Data, Realm - Advanced data parsing & security with Retrofit, Moshi, GSON, Alamofire - Push notifications: FCM, APNS, OneSignal, custom schedulers - Built mobile apps powering live sports stats, geolocation trackers, and health dashboards ⚙️ DevOps, CI/CD & Testing - Fastlane, GitHub Actions, Bitrise, Xcode Cloud, Firebase App Distribution - Unit testing, Espresso, XCTest, UI Automator, and snapshot testing - Optimized delivery pipeline for 2x faster release cycles - Code linting, crash analytics, beta testing, and staged rollout strategy - Crash-free session rates increased to 99.8% on enterprise mobile apps 📊 Mobile Analytics & Monetization - Analytics: Firebase, Amplitude, Google Analytics, Mixpanel - Monetization: in-app purchases, subscriptions, AdMob, Facebook Ads - Real-time event tracking and funnel optimization - Improved retention and session time by 60% using data-driven iteration 🔌 Hardware & Native SDK Integrations - Core Bluetooth, Core Motion, HealthKit, Google Fit, PassKit, Apple Pay - Camera, audio, video processing with AV Foundation & CameraX - Third-party SDKs: Twilio, Sendbird, Stripe, Agora, Mapbox, OpenCV - Built IoT control panels, BLE device dashboards, and voice-command apps 🌍 Industries Served - Fintech & Banking (KYC, payments, secure auth) - Healthcare & Fitness (wearables, telemedicine, step tracking) - E-commerce & Retail (catalogs, product scanners, loyalty apps) - Smart Home & IoT (remote control, Bluetooth integration) - Education, Social Networking, Travel, Utilities, Entertainment ✅ Let’s Build a Mobile App That Delivers From native Android/iOS development to efficient cross-platform delivery - I bring full-cycle mobile expertise to help you design, build, scale, and optimize your app. 📩 Ready to launch something impactful? Text me!

I help startups and businesses build high-performance mobile applications for iOS and Android using Flutter, Firebase, and Node.js. Over the years, I've worked on booking platforms, telematics systems, real-time tracking applications, marketplaces, wellness apps, and AI-powered products. My focus is not just writing code but delivering mobile apps that are scalable, reliable, and ready for production. What I Can Help You Build ✔ Cross-platform mobile apps with Flutter ✔ MVP development for startups ✔ Firebase Authentication, Firestore & Cloud Functions ✔ REST APIs & Node.js backends ✔ Google Maps, GPS Tracking & Geolocation ✔ Push Notifications (FCM) ✔ Real-time Chat & Live Data Applications ✔ Payment Gateway Integration (Stripe, PayPal, In-App Purchases) ✔ FlutterFlow Development & Custom Code Extensions ✔ AI Integrations using OpenAI & Claude APIs ✔ App Store & Google Play Deployment Recent Projects Telematics Tracking Platform Real-time vehicle tracking GPS monitoring Driver activity tracking Cross-platform Flutter application LINES Real-time nightlife and event platform Custom APIs Redis caching High-performance backend architecture Stayhopper Hotel and apartment booking application Payment integrations Booking workflows Mobile-first experience Pet Care Platform Community-driven mobile application Location-based services User-generated content Firebase backend Why Clients Hire Me ✓ Top Rated Upwork Freelancer ✓ Proven track record with Flutter & Firebase projects ✓ Strong communication and project ownership ✓ Clean, maintainable code ✓ Focus on performance and user experience ✓ Long-term support after launch If you're looking for a developer who can take your idea from concept to App Store and Google Play release, let's discuss your project.