I connect the embedded and desktop worlds by building reliable software that moves seamlessly between hardware, operating systems, and user‑facing applications. With 10+ years of hands‑on development, I specialize in solving complex technical problems across embedded systems, cross‑platform desktop apps, and hardware–software integration. Embedded: (C/C++ | C# | Python | Swift | Objecitve-C | JavaScript) - (Raspberry Pi | ESP32 | STM32 | Nordic nRF ) Worked on following technologies: -- Embedded / Linux: Raspberry PI (RPi), STM32, ESP32, Nordic nRF, FreeRTOS, Bluetooth LE, CMake, MQTT, OpenCAN, Modbus, RS232, SPI Desktop: (C# | C/C++ | Swift | Objective-C | Python ) - Windows Desktop Application (WinUI | AvaloniaUI | MAUI | UWP | WPF | WinForms) | MSI Installers | COM+ Excel/Word | MacOS Desktop Application (AvaloniaUI | Swift | Objective-C) Created application as scripts | command-line applications | add-ins | Windows services | Windows desktop application with or without installers. ~~ AvaloniaUI | WinUI | UWP | WPF | MAUI | WinForms ~~

I am a mobile developer, with 8 years experience. Responsible, creative, with initiative and punctuality. I responsibly assume the challenges and goals that are assigned to me, can work under high pressure and solve problems efficiently. I have used Geo location, Geo fencing, Payment integration, Facebook/Twitter/Instagram, and lot of other technologies. ✫✫✫✫ My Skills ✫✫✫✫ - Cross platform mobile: Xamarin Forms, Xamarin.Android, Xamarin.iOS - RESTfull API - Version control system GIT - Project manager Jira, Trello My focus is to provide high quality product at the final stage of my work.

Senior .NET MAUI Developer | Xamarin → MAUI Migration | Cross-Platform Mobile Engineer Senior .NET MAUI Developer with 10+ years in cross-platform mobile development. Expert in Xamarin → .NET MAUI migration, Android & iOS apps, clean architecture, and production-ready delivery. I help businesses modernize Xamarin apps, build scalable .NET MAUI solutions, and deliver stable mobile products ready for long-term support. Built and maintained 20+ production mobile applications for Android and iOS, including enterprise and consumer apps. Strong expertise in Xamarin → .NET MAUI migration, performance optimization, and native platform integrations. 💡 Experience & Expertise - .NET MAUI application development (Android, iOS, MacOS, Windows) - Xamarin.Forms / Xamarin Native → .NET MAUI migration - Custom UI and native platform integrations - Bluetooth (BLE) device integration - HealthKit and Google Fit connectivity - Business logic architecture and backend integration - Gamification and engagement mechanics - Flutter app development (secondary skillset) 🧰 Technologies & Tools I Use - .NET MAUI / Xamarin.Forms / Xamarin Native - C#, .NET 8+, MVVM (MvvmCross / CommunityToolkit.MVVM) - Flutter / Dart - REST APIs, SignalR, BLE SDKs, Payment SDKs - SQLite, Realm, Cosmos DB, Microsoft SQL Server - Visual Studio, Rider, Git, Azure DevOps, CI/CD 🚀 Why clients choose me: - 10+ years in mobile development - Deep Xamarin legacy + modern MAUI expertise - Clean architecture and long-term maintainability - End-to-end delivery (idea → stores → support)

I am a responsible and committed Xamarin developer with a get-it-done, on-time, and high-quality product spirit and more than a decade of experience defining requirements, designing, implementing, testing, and delivering mobile apps using a variety of Xamarin (android&iOS) and familiar with java and swift as for the native platform. I am also experienced in Asp.net, Webforms, MVC, and .net core. I have hands-on experience: AppCenter Google maps. Baidu maps (China) Google street view, Panorama view. Place autocomplete address with google maps. Signature pad Time tracking system SignalR Discoverable Bluetooth devices connectivity Social medial login (apple, gmail, facebook, linkedin). Third-party API integration Stripe payment gateway 3D secure stripe payments Micro charts Reports printing SQLite database RESTful web services Multi language Deep Linking Git Version Control and much more.

Greetings! My name is Sergii, and I’m a Xamarin Certified Mobile App Developer with more than 6 years of experience. I started my way in web and mobile development back in 2012 as a Casual Game Developer working for FIVE-BN (Alawar Division), and gathered some beneficial knowledge on how to create game logic, optimizing game performance, game deployment, and bug fixing. Later on, I have worked as a C# Developer in SoftReactor LLC, where I’ve gained and polished my skills related to ASP.NET Core, C#, MySQL, WPF, XAML. At almost the same time, I’ve started my own company - HeadWorks, where till present days my team and I have been creating web, mobile, hardware (embedded) projects, helping other companies to implement and convert their ideas into reality. In 2014 I’ve discovered Xamarin and incorporated it into what I have been doing - cross-platform mobile applications for iOS and Android. The tech-stack and skills I have acquired: - Cross-platform mobile app development using Xamarin: Xamarin.Forms, Xamarin.Native (Android, iOS), MVVM, Prism, MVVM Cross, MVVM Light, MVVM Fresh, ReactiveUI, AJAX - Creating complex enterprise-level custom solutions using C#, C++, MySQL, ASP.NET MVC, .NET Framework (CLR), .NET Core (CoreCLR), .NET GC, Azure, REST API, Web API, Google Maps API, Twitter API - Front-end development: HTML, CSS, JS, Angular - Facebook SDK, Visual Studio - Version control systems: Git, Github, SVN - iBeacons, Eddystone (estimote, kontakt.io) - Payment processors (Stripe, PayPal, Apple Pay, Webmoney, Yandex.Money) - Analytics and crash analytics (HockeyApp, Microsoft Insights, Firebase) I have recently started acquiring new skills on Objective-C, Swift, Java, Xcode and am planning on concreting the knowledge in the future. I’m open to everything new in the world, love to learn and prove myself, so all your queries and projects are greatly appreciated, and I’m ready to support you around the clock. I’ve been working with both individual clients, private and public companies (enterprise clients) and have helped them to bring their business ideas, thoughts, projects into life. Hesitation is the enemy of success, so send me the message, and let’s get your project into shape!

✅ I am .NET developer - MAUI/Xamarin: 7 years of experience - WPF: 5 years of experience - ASP.NET Core/Blazor: 1 year of experience - Antigravity and AI assisted development: 1 month of commercial experience Usually I am working solo as subcontractor. So I don't sell hours or progress reports, I take responsibility for the end result. If you have an idea for a new app and need good final result, please invite me. The tasks I am good for: - AI assisted full stack .NET development - mobile client app for an existing web service in your business - prototype mobile app for proof of concept to check a new business idea - set of new features for your existing app - .NET based Windows client development ⚡️ Currently I am interested in fixed price projects with a budget $500 and above. If you have great business idea and need a new app or service let me create minimum viable product for you.

📱 Android & iOS Mobile App Developer | .NET MAUI Expert | Xamarin to MAUI Migration Specialist I am a passionate Full-Stack Mobile App Developer with expertise in Android, iOS, Xamarin, .NET MAUI, Flutter, and ASP.NET technologies. I specialize in building high-performance mobile applications, modernizing legacy apps, and delivering scalable solutions for startups and enterprises. 🚀 Successfully Delivered Mobile Apps Across Healthcare, IoT, POS, E-Commerce, Logistics, Education, Finance, and Enterprise Industries. 🔄 Xamarin to .NET MAUI Migration Expert – Successfully migrated 40+ Xamarin applications to .NET MAUI with improved performance, maintainability, and cross-platform compatibility. ⭐ Top-Rated Professional with Excellent Client Feedback ✅ 100% Job Success 💻 Expertise in Android (Java/Kotlin), iOS (Swift/SwiftUI), Xamarin, .NET MAUI, Flutter, ASP.NET Core, Blazor, Web APIs, and Cloud Integrations. 🔌 Strong experience integrating Payment Gateways (Stripe, RevenueCat, PayPal), Bluetooth Devices, NFC, Barcode/QR Scanners, Thermal Printers, IoT Devices, Maps, and Third-Party APIs. 🎯 I focus on clean architecture, maintainable code, performance optimization, and delivering applications that provide exceptional user experiences. Let's collaborate and transform your app idea into a reliable, scalable, and successful product. 🚀

iOS | Android | React Native, Xamarin| Flutter | Apple Watch | Cloud (AWS & Azure) I have worked with a wide range of Mobile Apps including Mobile apps for startup companies, Enterprise Applications. My core competency lies in the complete end-end development of a New /Existing Mobile App project and I am seeking opportunities to build a great app for you that gives you quick ROI & increases downloads of our app. • Expert understanding of core mobile technologies standards. • Development of software, mobile web apps, and hybrid mobile apps • Solid understanding of how the android & iOS OS works for the best performance • I am flexible with my working hours and am happy to work closely with any existing freelancers/companies you work with. • Ability to write high-performance, maintainable and reusable code • Support Data safety form in Google Play Console • Support Android 13 (API level 33) Below are the areas in which I have worked : - Social Media & Social Networking related apps. - Music streaming & video streaming - Indoor mapping, Indoor wayfinding, and Indoor location. - Health & Fitness Apps - Social dating app, iOS & Android. Booking system for Restaurants, Hotels, Travel Booking. - iOS, Android application for recipes - Logistics Dispatch App. - Slot machine Game. - Event-related mobile apps, Use of the calendar, Push notification - Classified, Directory app, Business listing apps. - CMS & Backend-based Mobile App. - Mobile App for Website. - Taxicab app like Uber, WhatsApp clone - Attendance System, Mobile app for Android, IOS - The inspection related to the mobile app. - Video Player, Video Streaming, Social media video app - Geo-location Social Networking GeoFencing - Website & Mobile App Similar/identical to Airbnb. - Life Coach / Business Coach Planner & Journal App Development Tools:- Xcode, Visual Studio Photoshop Slicing & Design Implementation Xamarin Studio React NativeVisual Code ATOM Eclipse, IntelliJ, ADT Programming Languages:- HTML5 Objective-C Python Java C/C++/C# JavaScript PHP NodeJS REACT NATIVE Vuejs Ruby Frameworks, APIs, Services:- JSON, XML, SOAP DropBox APIs Yelp APIs, Foursquare APIs Android Material Design Facebook APIs, Twitter APIs, LinkedIn APIs (auto verification with social media login) Instagram APIs, Youtube APIs Google APIs (Map APIs, Place APIs, ... ) Advertisement (iAd, AdMob, RevMob, ... ) Java for native Android app NodeJS for backend API development My Expertise Area:- ✔ Ability to attain a quick understanding of the FRS / SRS and generate adequate test cases to ensure *near* 98% coverage of requirements. ✔ In case, no concrete requirement document is available, it can make use of Exploratory Testing skills to perform testing with excellent results. ✔ Good understanding of Software Development Life Cycle (SDLC) and Software Testing Methodologies. Possesses good Communication, Analytical, Problem-solving, and Documentation skills. ✔ Good English writing & speaking skills AI MI Expertise- Artificial Intelligence, Natural Language Processing, Machine Learning, Deep Learning, Robotics, Computer Vision, Chatbot, Neural Networks, Big Data, Data Science, Ethics, Automation, Language Model, Cognitive Computing, Virtual Assistant, Sentiment Analysis, Image Processing, Speech Recognition, Reinforcement Learning, Predictive Analytics. I would love to discuss your requirement, please feel free to contact me. Thanks & Regards Ashish M Pawar

👋 Hi! I am a Full Stack .NET Developer with 5+ years of experience building scalable and high-performance web and mobile applications. I specialize in end-to-end development of enterprise-grade solutions using ASP.NET Core, C#, Web APIs, Angular, Vue.js, along with cross-platform mobile development using React Native, Xamarin, and .NET MAUI for Android and iOS. I focus on building applications with strong architecture, clean code, performance optimization, and smooth user experience. From idea to deployment, I handle the complete development lifecycle and ensure reliable, production-ready solutions. 𝐂𝐨𝐫𝐞 𝐬𝐭𝐫𝐞𝐧𝐠𝐭𝐡𝐬: ✔ Scalable backend architecture (.NET Core) ✔ Cross-platform mobile apps (React Native / .NET MAUI) ✔ Complex business systems (ERP / CRM / workflows) ✔ Clean, maintainable, production-ready code ✔ End-to-end ownership (design → deployment) ✔ Legacy System Modernization 👉𝐏.𝐒. 𝐌𝐲 𝐜𝐨𝐦𝐩𝐥𝐞𝐭𝐞 𝐬𝐤𝐢𝐥𝐥𝐬𝐞𝐭 𝐢𝐧𝐜𝐥𝐮𝐝𝐞𝐬 𝐭𝐡𝐞 𝐟𝐨𝐥𝐥𝐨𝐰𝐢𝐧𝐠 𝐬𝐤𝐢𝐥𝐥𝐬: • Frontend: React / Angular / Vue.js (TypeScript), HTML5, CSS3 • Backend: ASP.NET Core, C#, Web APIs, Entity Framework Core • Mobile: React Native / .NET MAUI • Database: MS SQL Server, PostgreSQL, MySQL, MongoDB • AUTH: JWT, Role-based access, ASP.NET Identity • Cloud: Azure / AWS (App Services, Functions, EC2, S3) • DevOps: Docker, CI/CD (Azure DevOps, GitHub Actions) • Testing: NUnit, Selenium, Cypress, API & business logic testing • AI Tools: OpenAI, Azure AI, Copilot, Cursor, Claude (with validation & testing) I take ownership of designing and delivering scalable technical solutions, ensuring applications are reliable, maintainable, and aligned with business goals. I enjoy working closely with stakeholders to turn ideas into real, production-ready systems. Are you looking for a full-time & dedicated C#, ASP.NET MVC, .NET, /Xamarin/.NET Maui and Vue.js developer to develop a user-friendly, high-end functionality-based website or web application? I would love to engage myself as a Full Stack ASP.NET developer and assist you with a fully innovative and creative strategy.

🎖️Top Rated .NET developer 🏆Worked 500+ hours with 100% Job Success Score 🏅Certified .NET Architect ⭐⭐⭐⭐⭐𝙍𝙚𝙫𝙞𝙚𝙬:- "Nazim has been an invaluable Angular developer on our team His commitment to delivering high-quality code on time has greatly contributed to our projects' success. I wholeheartedly recommend Nazim for his Angular expertise and dedication" 𝗕𝗶𝗼:- I am a full-stack developer with 10+ years of experience. I have hands-on experience with frontend development, backend development, API development, payment gateway integration and complex databases. 𝐂𝐨𝐫𝐞 𝐒𝐤𝐢𝐥𝐥𝐬: ✔️ Full Stack .Net Development:- ASP.Net Core, ASP.Net MVC, C#, Web Forms, WinForms, .Net core MVC, JavaScript, Angular, React, Vue.Js, CI/CD, Docker, Azure, EntityFramework, Microservices, Multi-tenancy, Clean Architecture, SOLID, DRY, OOP, DSA and GitOps. ✔️ Mobile App Development:- Xamarin, Xamarin Forms, .Net MAUI, and C#. ✔️ Databases: MongoDB, MYSQL, GraphQL, MSSQL Server, Firebase. 𝐈 𝐡𝐚𝐯𝐞 𝐰𝐨𝐫𝐤𝐞𝐝 𝐨𝐧 𝐬𝐞𝐯𝐞𝐫𝐚𝐥 𝐩𝐫𝐨𝐣𝐞𝐜𝐭𝐬 𝐚𝐧𝐝 𝐡𝐚𝐯𝐞 𝐞𝐱𝐭𝐞𝐧𝐬𝐢𝐯𝐞 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 𝐢𝐧 𝐚𝐫𝐞𝐚𝐬 𝐬𝐮𝐜𝐡 𝐚𝐬: Fintech Healthcare, Wellness Cab or Taxi Booking Delivery Chats & Messengers (Audio, Video chats) On-Demand Services Fitness Social Networking Job Marketplace E-Commerce Please contact me to discuss your requirements to determine how I can utilize my skills to help you. Regards, Nazim Hussain