Hire the Best Xamarin Developers

🏗️ Most developers build mobile apps. I build mobile products that survive version 2. Top Rated · $90K+ Earned · 100% Job Success · 7+ Years Experience There's a difference between an app that launches and an app that lasts. After 7+ years and 50+ production apps — built for startups shipping their first product and enterprises modernizing legacy Xamarin codebases — I know exactly what separates the two: architecture decisions made on day one. I specialize in .NET MAUI for cross-platform iOS & Android, with deep roots in Flutter, Xamarin, and ASP.NET Core backend. Whether you're starting fresh or inheriting a mess, I'll tell you the truth about what it takes — then build it. WHY CLIENTS CHOOSE ME ✅ Cross-platform apps that feel native — without the native price tag ✅ Clean MVVM + Dependency Injection architecture you won't rewrite in 12 months ✅ CI/CD pipelines, automated testing, and App Store deployment handled end-to-end ✅ Clear communication, regular updates, zero ghosting ✅ Long-term thinking — I build for your product's future, not just the current sprint WHAT I BUILD 📱 Mobile Apps (iOS & Android) → .NET MAUI with Shell navigation, MVVM, CommunityToolkit & Dependency Injection → Flutter with Dart, Provider / Riverpod / Bloc, and native integrations → Pixel-perfect responsive UI, 60fps animations, platform-specific optimizations → Offline-first architecture with local SQLite / Realm databases 🔄 Xamarin → .NET MAUI Migrations → Full codebase audit, renderer → handler migration, performance benchmarking → Upgraded to modern .NET 8/9 with Hot Reload and improved startup time → Custom controls rewritten with the new MAUI Graphics API ⚙️ Backend & Cloud → ASP.NET Core REST APIs with JWT auth, rate limiting & Swagger docs → Azure (App Service, Functions, Blob Storage, Notification Hubs, AD B2C) → Firebase (Auth, Firestore, Realtime DB, FCM push notifications) → Real-time features with SignalR — chat, live dashboards, instant notifications → GraphQL APIs and third-party integrations (Stripe, Twilio, Google Maps, SendGrid) 🤖 AI-Powered Features → On-device OCR with ML Kit & Tesseract → OpenAI / GPT-powered chatbots and voice-to-text (Whisper API) → Image recognition with Azure Vision & TensorFlow Lite → Smart search and recommendation engines 🛒 Complex App Features → Stripe & in-app purchase subscriptions (App Store / Play Store billing) → Real-time booking systems with calendar sync and push reminders → Google Maps / Mapbox with geofencing and live location tracking → Multi-role user systems with granular permissions and admin panels APPS I'VE SHIPPED TrinDocs · Crushfit · Slice & Spin · CV Wallet · HBoxTV — and 45+ more TECH STACK AT A GLANCE Mobile → .NET MAUI · Flutter · Xamarin Backend → ASP.NET Core · Node.js · GraphQL · SignalR Cloud → Azure · Firebase · AWS Database → SQL Server · PostgreSQL · SQLite · Firestore DevOps → GitHub Actions · Azure DevOps · App Center · Fastlane HOW WE'LL WORK TOGETHER You send a message describing your project We jump on a free 15-minute discovery call I send a clear proposal with architecture plan, timeline & milestones We build — with weekly demos, clean git history, and zero surprises Ready to build something great? Send me a message — I typically respond within a few minutes.

Hi, I’m Sweta, a senior mobile app developer who helps startups, product teams, and businesses build production-ready mobile apps that are stable, scalable, and built for real users. On Upwork, I’ve logged 8,700+ hours, earned $200K+, completed 24 jobs, and maintained a 100% Job Success Score with a Top Rated Plus track record. Clients trust me to handle everything from app architecture and development to bug fixing, migration, deployment, and long-term support. 💡 WHY THIS SPECIFIC PROFILE WINS: Senior Flutter Developer 8.7K+ Hours: Clients often search for experienced Flutter developers who can handle real production apps, not just basic screens. Top Rated Plus Mobile App Developer: This shows reliability, long-term delivery, and trust from serious Upwork clients. 100% Job Success Developer: This reduces client risk and proves consistent project success. .NET MAUI & Xamarin Migration Expert: Many businesses still need help moving old Xamarin apps to modern MAUI or rebuilding unstable legacy apps. Cross-Platform Mobile Specialist: Flutter, React Native, MAUI, iOS, and Android keywords help the profile rank for high-demand mobile app projects. 𝐖𝐇𝐀𝐓 𝐘𝐎𝐔 𝐂𝐀𝐍 𝐄𝐗𝐏𝐄𝐂𝐓: ✅ Clear App Planning: I review your app, users, current issues, and goals before development starts. ✅ Clean, Maintainable Code: Mobile codebases that are easier to scale, debug, and improve. ✅ Stable Delivery: Regular updates, realistic timelines, and early communication if risks appear. ✅ App Store & Play Store Support: Help with builds, testing, release preparation, and deployment. ✅ Long-Term Support: Bug fixes, performance improvements, feature updates, and maintenance after launch. 𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊 𝐈 𝐔𝐒𝐄 𝐃𝐀𝐈𝐋𝐘: Mobile: Flutter, .NET MAUI, Xamarin, React Native, Swift, SwiftUI, iOS, Android Languages: Dart, C#, JavaScript, Swift Backend & APIs: REST APIs, Firebase, Firebase Auth, Firestore Architecture: Clean Architecture, scalable systems, performance tuning, app modernization Delivery: CI/CD, release management, testing workflows, App Store, Google Play 𝐑𝐄𝐂𝐄𝐍𝐓 𝐒𝐔𝐂𝐂𝐄𝐒𝐒 𝐒𝐓𝐎𝐑𝐈𝐄𝐒: Flutter App Development: Built production-ready iOS and Android apps with clean architecture, Firebase, REST APIs, push notifications, and scalable workflows. Xamarin to .NET MAUI Migration: Modernized legacy mobile apps by improving code structure, fixing performance issues, and preparing apps for long-term support. Mobile App Performance Rescue: Reduced crash rates by up to 40% and improved app performance by 25% to 50% through debugging, optimization, and architecture cleanup. Startup MVP Delivery: Helped businesses move from idea to working mobile app with practical planning, fast development, testing, and release support. If you need a reliable developer who can build, fix, migrate, optimize, or launch your Flutter, MAUI, React Native, iOS, or Android app, send me your app details and goals. 📩 I typically reply with a clear review, practical next steps, and a realistic plan for moving your app forward. 𝐊𝐞𝐲𝐰𝐨𝐫𝐝𝐬: Senior Flutter Developer 8.7K+ Hours, Top Rated Plus Mobile App Developer, 100% Job Success Developer, Flutter App Developer, .NET MAUI Developer, Xamarin Migration Expert, React Native Developer, iOS Developer, Swift Developer, SwiftUI Developer, Android App Developer, Cross-Platform Mobile App Developer, Mobile App Architecture, App Modernization, Legacy App Migration, Xamarin to MAUI Migration, Firebase Developer, REST API Integration, App Store Deployment, Google Play Deployment, Mobile App Bug Fixing, Crash Fixing, Performance Optimization, Startup MVP Builder, SaaS Mobile App Development, API-Driven Mobile Apps, Clean Architecture, Scalable Mobile Applications, CI/CD, Push Notifications, Long-Term Technical Partner.

I help companies migrate Xamarin applications to .NET MAUI, fix difficult ASP.NET Core issues, and rescue legacy .NET systems that other developers struggle to stabilize. Clients usually hire me when: • A Xamarin → .NET MAUI migration is failing or incomplete • An ASP.NET Core backend issue has remained unresolved • Performance problems are slowing down production systems • A legacy .NET application needs modernization without downtime • A desktop/mobile system requires reliable long-term architecture Recent work includes: • Migrating production Xamarin apps to .NET MAUI • Resolving long-standing ASP.NET Core issues unresolved by previous freelancers • Building high-performance middleware for machine communication • Developing POS and enterprise systems using ASP.NET Core, Blazor, and WPF I focus on fast diagnosis, maintainable architecture, and reliable delivery with minimal hand-holding. Core Expertise: • .NET MAUI & Xamarin Migration • ASP.NET Core MVC / Web API • Blazor & Enterprise Web Applications • WPF Desktop Applications • SQL Server Optimization & Entity Framework Core • REST APIs & Backend Architecture • Middleware & Hardware Communication Systems • Performance Optimization & Debugging Technical Stack: C#, .NET MAUI, Xamarin, ASP.NET Core, Blazor, WPF, Entity Framework Core, SQL Server, SignalR, REST APIs, Azure App Services, Web API, JavaScript Currently working full-time on enterprise ASP.NET Core systems, REST APIs, SQL optimization, and large-scale .NET applications. I communicate clearly, work independently, and write clean, scalable code designed for long-term maintainability.

Need help with mobile app, game and web app development? Fill free to contact me any time for your project! I am just one click away for finding the right solution for you. 10+ years of experience in the field of Software Application developed on Microsoft Technologies included MAUI, Xamarin (Xamarin.Forms, Xamarin.iOS and Xamarin.Android), I have developed a wide range of mobile applications for smartphones, tablets. I have been spending every spare minute writing code for the iPhone and Android as well and learning everything on mobile application development. I'm mainly interested in mobile app development but I'm able to handle cross-client development including backend/API and web application. ******** My skills ********* ✅ Xamarin app development (C#, Native, Forms, Android, iOS, Telerik SDK) ✅ Program language: C#, .Net ✅ Android app development (Java, Kotlin, Google Play Store) ✅ IOS app development (Swift, Objective-C, App Store) ✅ Database (SQLite, SQL Server, MySQL, Firestore) ✅ 3rd Party API Integration (Facebook, Twitter, Vimeo, Pinterest, Youtube, Google+ API) ✅ Google maps, GPS, Current Location, Google Places, Markers ✅ Payment System (Stripe, Paypal, PayTM, BrainTree, WePay, Credit Card, PaypalHere, iZettle, Vantiv, Tyro, Mint, and AssemblyPayment) ✅ Pixel perfect, Interactive and complex UI ✅ MVVM Pattern and MVVM Framework like Prism, MVVMLight, and MVVMCross ✅ Local SQLite DB integration and EntityFramework Core with SQLite ✅ Flight mode safe application - Online-Offline data synchronisation in background. ✅ Hardware integration -Barcode scanner. which are connected though the LAN, WiFi & Bluetooth. ✅ Convert Native libraries/SDK into C# ✅ API integration (SOAP, REST, JSON, XML, XMLRPC) ✅ Push Notification (Local and cloud - APNS, Firebase) ✅ Real-Time communication integration - Firebase, PubNub, SignalR and many more ✅ Chatting Implementation & Integration. ✅ Social App Integration (Google, Facebook, LinkedIn, Twitter) ✅ Barcode Scanning & Generating ✅ QR Code Scanning & Generating ✅ MagStripe Reader (Swipe card) & NFC Reader ✅ Map Integration ✅ Deep linking using Firebase Dynamiclink ✅ Google AdMob integration ✅ Parse API integration. ✅ Unit Testing, Sanity Testing, Integration Testing ✅ Azure, Firebase, AWS ✅ Github, AzureDevOps, AppCenter, JIRA, Bitbucket ✅ Clean Code ✅ Apple and Google In-App purchase integration ✅ Publish app on AppStore and PlayStore ****** Stack of Web Technologies ******* ✅ Knowledge of Frameworks: PHP- Laravel ✅ Knowledge of HTML, Ajax, XML, JSON, CSS ✅ Knowledge of JS libraries: JQuery, JQuery UI, YUI, etc. ✅ Knowledge of template engines: Twig, Smarty ✅ Knowledge of the Bootstrap framework ✅ Knowledge of CSS preprocessors: SASS, LESS ✅ Skills with databases: MySQL, Oracle, MS SQL, Firebird, PostgreSQL ✅ Knowledge of NoSQL: MongoDB, Redis, Memcached ✅ Knowledge of OOP, SOLID and MVC concepts ✅ Skills with VCS: Git, SVN ✅ Skills with the Composer dependency manager ✅ Experience with server side JS: Node.js, Express.js, WebSockets ✅ Experience with virtual machines configuration with Vagrant and Puppet ✅ Experience with payment gateways: Pay_Pal, Authorize.Net, Solid Payments ✅ Skills with social networks API: Facebook, Twitter, Instagram, OK, VK ✅ Skills with GIS: Google Maps API, Yandex Maps API, VNetGIS ✅ Knowledge of MaxMind API, minFraud API ✅ Skills with the Photoshop graphics editor ✅ Basic knowledge of HTML Canvas and Flash ******Game Development: ✅ Unity 2D/3D games ✅ Game Development What is the difference between other developers and me, and why should you hire me? ✅ Develop mobile app by following Apple, Google, and Windows development guideline. ✅ Always reply quickly and give my 100% dedication to your project to make it live. ✅ 100% Job Success ✅ 100% Client Satisfaction

I have 14 years of experience in Java, Android, iPhone, and Web Development. I have developed over 150 Android and iPhone apps, many of which are available on various app stores, along with their corresponding backends and web applications. I am capable of delivering any type of high-quality application on time. ✅ Top Rated ✅ More than 10600 hours of work ✅ SwiftUI, React Native, Flutter, MAUI ✅ Back-end API development (Node.JS / Flask / Django) ✅ Machine Learning

👋 Hi, I'm Dhaval — Senior Full Stack Developer | React.js | Node.js | .NET | Cloud With 13+ years of experience, I build modern, scalable, and high-performance web & mobile applications that drive real business results. From US taxation systems to stock exchange (LSE) trading platforms, I’ve delivered reliable, enterprise-grade solutions that stand the test of scale and complexity. 💡 What I Bring to the Table Frontend: React.js, Next.js, Angular, Blazor, Vue.js, Electron Backend: Node.js, C# .NET (ASP.NET Core/MVC), Microservices, REST & GraphQL APIs Integrations: Zoom, QuickBooks, Zoho, Google Maps, Payment & CRM APIs Mobile: React-Native, Xamarin.Forms (Cross-platform) AI & Automation: Smart workflows and ML-driven insights Cloud & DevOps: Azure DevOps, AWS (Lambda, Cognito, API Gateway, DynamoDB) Databases: SQL Server, PostgreSQL, MySQL, MongoDB, DynamoDB ⚙️ Tools & Frameworks I Use Redux, NgRx, Highcharts, AG Grid, Material UI, Ant Design, Bootstrap, jQuery, Sequelize, Mongoose, WCF, MVVM, NServiceBus 🚀 Why Clients Choose Me Proven experience leading architecture and development of complex systems Passion for clean code, scalability, and long-term maintainability Excellent communication, reliability, and on-time delivery Flexible across time zones with a proactive, problem-solving mindset Let’s collaborate to build something impactful — whether it’s a new idea from scratch or enhancing your existing platform. I’m open to both short-term projects and long-term partnerships.