Hire the Best HTCI Labs DART Specialists

Need a high-performance iOS and Android app without paying for two separate native teams? I build production-ready Flutter and FlutterFlow apps from a single codebase, so you ship to both stores faster, cheaper, and with one team instead of two. As a Top Rated Plus mobile engineer with a 94% Job Success Score and over $200K+ earned on Upwork, I turn complex backend systems into fast, fluid mobile experiences. Whether you need a brand-new MVP from scratch, an AI-powered app, or a rescue mission for a buggy legacy codebase, I write clean, scalable, architecture-compliant code that's built to last. 📱 See the proof, not just promises: I've shipped real, live apps you can download and test today, marketplaces, AI clinical tools, on-demand logistics, wellness, and education platforms. Check the portfolio section below on my profile to download them straight from the App Store and Google Play. ✅ Problems I solve for clients: "My app idea needs to launch on iOS and Android fast" → one Flutter codebase, both platforms, half the cost. "I have designs but no developer" → Figma-to-Flutter conversion into responsive, pixel-accurate UI. "I need AI features in my app" → speech-to-text, LLM/ChatGPT APIs, and automated data workflows integrated cleanly. "I need payments and subscriptions" → Stripe, in-app purchases, and billing systems done right. "My existing app is slow or buggy" → performance tuning, refactoring, and bug rescue on legacy code. "I need it on the stores" → full App Store and Play Store deployment and compliance handled end to end. 🛠️ Technical Stack: Mobile: Flutter, FlutterFlow, Dart, Kotlin, Java State Management: BLoC, Riverpod, Provider, Clean Architecture AI Integrations: Speech-to-text, LLM/OpenAI APIs, automated summarization Backend & Cloud: Firebase, Supabase, MySQL, REST APIs, SQLite, Azure DevOps CI/CD Native: Geofencing, background services, push notifications, Stripe & in-app subscriptions Design: Figma-to-Flutter, Material Design, responsive multi-device layouts 📈 How we'll work: A short discovery call to map your architecture, a clear scope and timeline, clean code with regular check-ins, and a tested app deployed to both stores. If this sounds like what you need, click "Invite to Job" at the top right, share your Figma files or requirements, and let's map out your build.

👑 Top Rated Flutter Developer with 100% Job Success 👑 I’m a senior Flutter developer with 5+ years of experience building apps for iOS, Android, web, and desktop. I can build your app from scratch, join your existing team, or help fix and improve your current Flutter project. If you have daily or weekly meetings, count me in. I can work with your designers, backend developers, project managers, or other mobile developers without any problem. I mostly work with Flutter, Clean Architecture, BLoC/Cubit, Riverpod, GetIt, REST APIs, Firebase, payments, subscriptions, notifications, maps, audio/video, real-time chat, and native iOS/Android integrations. I have built different types of apps, including fintech, banking, AI wellness, habit tracker, social media, health, fitness, meditation, GPS, task management, e-commerce, marketplace, and business apps. What you can expect from me: * Clean Flutter code * Clear communication * Regular updates * Fast and careful development * Good attention to bugs and edge cases * Support after release if needed I care about building apps properly. Not just something that works for now, but something stable, clean, and easy to improve later. If you need a reliable Flutter developer who can take responsibility and move your project forward, feel free to send me an invite.

Your app takes forever to load. Users drop off before they finish signing up. Crashes in production. And the developer who built it? Nowhere when things break. That's exactly the kind of work I clean up. And build right from the start. I'm Muzammil. 5 years building Flutter apps, 20+ live on the App Store and Google Play right now. Not side projects. Not demos. Real apps with real users. 𝐎𝐧𝐞 𝐨𝐟 𝐭𝐡𝐞𝐦 𝐜𝐫𝐨𝐬𝐬𝐞𝐝 𝟏𝟎𝟎,𝟎𝟎𝟎 𝐝𝐨𝐰𝐧𝐥𝐨𝐚𝐝𝐬. 𝐖𝐡𝐚𝐭 𝐈 𝐛𝐮𝐢𝐥𝐝: Flutter and Dart mobile app development for iOS and Android. Firebase integration (Firestore, Auth, Cloud Functions, FCM, Realtime Database). Real-time features including live chat, live order tracking, and multi-user sync. Payment gateway integration with Stripe, RevenueCat, and in-app purchases. Custom routing algorithms and GPS live tracking. Offline-first architecture with local caching and smart sync. Live streaming integration with Tencent Cloud. App Store and Google Play publishing, full submission process, rejection handling. 𝐀𝐩𝐩𝐬 𝐈 𝐡𝐚𝐯𝐞 𝐬𝐡𝐢𝐩𝐩𝐞𝐝: A logistics delivery app for a 𝐂𝐚𝐧𝐚𝐝𝐚-𝐛𝐚𝐬𝐞𝐝 𝐜𝐨𝐦𝐩𝐚𝐧𝐲 with custom routing and GPS live tracking. A trading platform with 100k+ downloads, real-time chat, and live news feed. A car buying and auction marketplace for a 𝐔𝐀𝐄 𝐜𝐨𝐦𝐩𝐚𝐧𝐲 with live auctions on both stores. A multi-vendor food and ecommerce app with city-wise filtering. A beach booking platform with Stripe and full booking management. A pregnancy tracking app with 7 tools and offline support. 𝐓𝐞𝐜𝐡 𝐈 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡: Flutter, Dart, Firebase, REST APIs, GraphQL, Stripe, RevenueCat, Google AdMob, Pusher, Tencent Cloud, Provider, Riverpod, GetX, SQLite, Hive, PHP, Laravel, Node.js, Android Studio, Xcode. 𝐖𝐡𝐚𝐭 𝐦𝐚𝐤𝐞𝐬 𝐭𝐡𝐢𝐬 𝐝𝐢𝐟𝐟𝐞𝐫𝐞𝐧𝐭: Most Flutter developers hand you a frontend and leave you to figure out the backend. My team covers backend too, so you get a complete app, not half of one. I test on real devices. I write error handling that catches problems before your users see them. And I don't disappear after launch. 𝐅𝐀𝐐 𝐐: 𝐂𝐚𝐧 𝐲𝐨𝐮 𝐡𝐚𝐧𝐝𝐥𝐞 𝐭𝐡𝐞 𝐛𝐚𝐜𝐤𝐞𝐧𝐝 𝐨𝐫 𝐣𝐮𝐬𝐭 𝐭𝐡𝐞 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 𝐟𝐫𝐨𝐧𝐭𝐞𝐧𝐝? A: My team covers backend too. PHP, Laravel, and Node.js. So you get a complete app delivered, not just the mobile side. 𝐐: 𝐃𝐨 𝐲𝐨𝐮 𝐡𝐚𝐧𝐝𝐥𝐞 𝐀𝐩𝐩 𝐒𝐭𝐨𝐫𝐞 𝐚𝐧𝐝 𝐆𝐨𝐨𝐠𝐥𝐞 𝐏𝐥𝐚𝐲 𝐬𝐮𝐛𝐦𝐢𝐬𝐬𝐢𝐨𝐧? A: Yes, full process. I've published 20+ apps on both stores and know the rejection reasons before they happen. Submission, review responses, and fixes are all included. 𝐐: 𝐂𝐚𝐧 𝐲𝐨𝐮 𝐰𝐨𝐫𝐤 𝐨𝐧 𝐚𝐧 𝐞𝐱𝐢𝐬𝐭𝐢𝐧𝐠 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 𝐚𝐩𝐩 𝐨𝐫 𝐨𝐧𝐥𝐲 𝐧𝐞𝐰 𝐩𝐫𝐨𝐣𝐞𝐜𝐭𝐬? A: Both. I've jumped into existing codebases plenty of times. Send me what you have and I'll tell you exactly what needs work. 𝐐: 𝐖𝐡𝐚𝐭 𝐢𝐟 𝐬𝐨𝐦𝐞𝐭𝐡𝐢𝐧𝐠 𝐛𝐫𝐞𝐚𝐤𝐬 𝐚𝐟𝐭𝐞𝐫 𝐥𝐚𝐮𝐧𝐜𝐡? A: I don't disappear after delivery. I stay available for bug fixes and support. Most issues I catch before launch anyway through real device testing. 𝐂𝐮𝐫𝐫𝐞𝐧𝐭𝐥𝐲 𝐭𝐚𝐤𝐢𝐧𝐠 𝐨𝐧 𝐧𝐞𝐰 𝐩𝐫𝐨𝐣𝐞𝐜𝐭𝐬. 𝐈𝐟 𝐲𝐨𝐮 𝐧𝐞𝐞𝐝 𝐚 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 𝐚𝐩𝐩 𝐛𝐮𝐢𝐥𝐭 𝐩𝐫𝐨𝐩𝐞𝐫𝐥𝐲 𝐚𝐧𝐝 𝐬𝐡𝐢𝐩𝐩𝐞𝐝 𝐰𝐢𝐭𝐡𝐨𝐮𝐭 𝐝𝐫𝐚𝐦𝐚, 𝐥𝐞𝐭'𝐬 𝐭𝐚𝐥𝐤.

Senior Flutter & Node.js Developer | 5+ Years Experience | Full-Stack Architect Overview Hi, I’m Usama Mukhtar, a Software Engineer and a certified Flutter and Node.js developer with over 5+ years of hands-on experience. I specialise in mobile app development using Flutter and backend development with Node.js. I help businesses transform ideas into user-focused, scalable, and high-performance digital products by using modern technologies and efficient development practices. Trusted By: Over 100 global clients across healthcare, fintech, e-commerce, POS systems. Success Rate: 95% client retention with more than 174 projects successfully delivered on time. Commitment: I offer a free 60-minute consultation to understand your requirements and align the technical strategy with your business goals. 🟢Technical Skills Strong experience with third-party libraries and RESTful APIs Skilled in Android and iOS development Expertise in state management and app architecture in Flutter Proficient in Firebase (authentication, real-time DB, Firestore, cloud functions) Experience with push notifications and in-app purchases Integration of payment gateways and subscription models Google Maps and location-based services API integration for real-time data handling and synchronisation Strong command of Dart Additional experience: Java, Kotlin, SQLite, HTML, JavaScript, CSS3, Git 🟢Soft Skills Excellent problem-solving abilities Strong communication and teamwork Professional documentation practices Responsible, reliable, and legally compliant Creative and proactive approach to resolving issues Ability to clearly understand and deliver business requirements 🟢Roles and Responsibilities Design, develop, test, and deploy mobile and web applications Collaborate with UI/UX designers, QA teams, and stakeholders Take ownership of delivering high-quality and user-friendly products Provide continuous support, updates, and maintenance Stay current with modern technologies and trends Optimize workflows and write clean, reusable code Build Flutter applications for both Android and iOS Follow company standards, best practices, and guidelines Develop reusable UI components for efficient scalability 🟢Conclusion With strong expertise in Flutter, Node.js, and full-stack development, I focus on delivering reliable, high-quality, and scalable solutions. I have hands-on experience with Firebase, push notifications, in-app purchases, payment integrations, maps, and API-based applications. Client satisfaction and clean, efficient code are always my top priorities. I am confident that I can deliver the results you need for your project.

✅ Top Rated Plus on Upwork ✅ 50+ Apps Delivered worldwide, Android, iOS & Web ✅ 4,000+ Hours · 100% Job Success ✅ AI-Powered Apps Live Across 3 Countries I build AI-powered mobile apps that go from idea to App Store, fast, clean, and production-ready. Specialising in AI automation, AI integration, and full-stack AI mobile development across HealthTech, FinTech, e-commerce, music, and SaaS. Here’s what I deliver: ✔️ Mobile Apps (Flutter, Flutterflow) - scalable, cross-platform apps for music, health, fitness, e-commerce, and marketplace apps, built with clean architecture and real-time functionality. ✔️ Web & SaaS Platforms (Next.js, Node.js, WordPress) - fast, secure, and modern systems with Stripe, AI-integration in web apps, admin portals, admin dashboards, third-party services, and analytics dashboards. ✔️ AI Integration - intelligent chatbots, AI health tools, smart assistants, and automation powered by OpenAI, Gemini, and Claude APIs built directly into the mobile app. ✔️ Backend & SaaS Platforms - scalable REST APIs, multi-tenant SaaS systems, admin dashboards, role-based access, subscription billing, and real-time analytics. Built with Node.js, NestJS, Express.js, FastAPI, Firebase, Supabase, and PostgreSQL. ✔️ Vibe Coding & Rapid Prototyping - FlutterFlow custom code extensions, full builds, and legacy app refactoring using Cursor IDE, Claude Code, Bolt.new, and Lovable for fast client validation and production-ready delivery. ✔️ App Store & Play Store - full deployment, CI/CD, Analytics, Crashlytics, and post-launch support. ⭐ Client feedback: "Fast, efficient and good quality work. Thank you Imran!" "It was a pleasure working with Imran. He delivered a high-quality app using Flutter, followed best practices, and communicated clearly throughout the project. Highly recommended!" Message me for a FREE 30-minute strategy call, you'll walk away with a clear development plan, tech stack recommendation, and honest timeline for your project.

Top Rated Flutter developer with a 100% Job Success Score and 40+ cross-platform apps shipped for startups, agencies, and enterprises across the US, India, and the Middle East. I build AI-powered mobile, web, and desktop apps from a single Flutter codebase, and take your product from idea to launch, including backend and deployment. If you have an existing app and want to add AI, chatbots, document/OCR processing, content generation, smart recommendations, that's exactly where I do my best work. What I build: ✓ Flutter apps for iOS, Android, tablet, web & desktop (one codebase) ✓ AI integration — OpenAI, Gemini, custom ML, MLKit/Textract OCR ✓ Backend-as-a-service — Firebase & Supabase (Auth, Firestore/Postgres, real-time, storage, push) ✓ Payment gateways — Stripe, Razorpay, PayPal, Apple Pay, Easebuzz, Juspay ✓ Real-time chat & notifications — Firebase, QuickBlox, GetStream ✓ Google Maps, live tracking, geofencing, polyline routing ✓ Clean architecture — BLoC, Provider, Riverpod, MVVM ✓ Backend & APIs — Node.js, REST, Dio/Retrofit ✓ CI/CD — GitHub Actions, Codemagic AI features I've shipped into real apps: ✓ In-app chatbots & assistants ✓ OCR + AI summarization (e.g., health-report extraction) ✓ AI content generation & smart recommendations ✓ Predictive analytics and decision automation ✓ Voice & image recognition Domains: healthcare, fitness, eCommerce, on-demand & delivery, and fintech/payments, plus IoT/vending and other complex integrations. Built with clean, scalable, maintainable code from day one. How I work: clear, proactive communication; architecture that scales from MVP to production; delivery measured by real business results, not just shipped code. If you want a Flutter partner who combines strong mobile architecture with practical AI and can own the whole build from idea to launch, let's talk. Availability: 30+ hrs/week · Fast, clear communication