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Available to start immediately. I build and fix real .NET & C# software. Click on Invite button to start conversation I’m a .NET Developer and C# Developer with 13+ years of experience working on production systems built in C#/.NET. Most of my work is focused on helping teams make their existing software more stable, scalable, and easier to evolve without risky rewrites. I’ve worked in long-term roles as a C#/.NET developer, often joining projects where the codebase already exists and needs structure, performance improvements, or careful modernization. 🧠 How clients usually come to me Very often, teams reach out to me as a .NET developer when they already have a product written in C#/.NET, but something isn’t working as it should. Changes are slow, bugs appear in unexpected places, or the architecture feels fragile. In those cases, I step in as a C# .NET Developer who understands how real systems grow over time and how to improve them without breaking production. Depending on the scope, I work either as a backend developer focused on logic and performance, or as a .NET Full Stack Developer when both backend and UI decisions need to be handled together. ⚙️ What I do in real projects Day to day, my work as a .NET Developer is very practical. I write and refactor C#/.NET, clean up .NET architecture, improve async flows, and make sure the application behaves predictably in production. In many projects, this naturally turns into .NET full stack work handling backend services, APIs, and UI integration where I step in as a .NET Full Stack Developer. When teams want a modern .NET Full Stack direction without splitting the codebase, I build new features or full applications using .NET MAUI/WPF/WinForms. I’ve worked with .NET apps both for new products and for migrations from older stacks like, where stability matters more than speed. 🧩 Types of systems I’ve worked on Over the years, I’ve worked as a .NET Developer, across different environments: 💻 Desktop software written in C#/.NET 🌐 Web platforms where I worked as a full stack developer on .NET backends 📱 Cross-platform apps built with .NET MAUI (Windows & Android only) 🧱 Larger products that required a true full stack developer approach 🔗 Mixed systems where .NET AI integration was part of the stack 🎮 Internal tools and simulators developed with C# 🤖 Careful use of .NET AI where it actually added value In several projects, I worked in React .NET setups, connecting React frontends to .NET backends while keeping responsibilities clean and clear. 🛠️ How I work with teams and data I’m comfortable joining existing teams and reading unfamiliar C#/.NET codebases. I focus first on understanding why decisions were made, then improving things step by step. I regularly work with SQL server, collaborate with Azure Data Engineer roles, and support data-heavy systems where performance & reliability are critical. This mix of responsibilities often places me in a .NET Full Stack Developer role even when the original task starts as pure backend work. 🛠️ Tech Stack .NET Framework, .NET 6 / 8 / 9 / 10 App Development - WPF, WinForms, WinUI, Blazor, .NET MAUI, MVVM Concurrency & Performance - Multithreading, async/await, Task Parallel Library Hardware & Protocols - Serial, Bluetooth LE, TCP/IP, UDP, RS232, RS422 Architecture & Quality - Clean Architecture, OOP, refactoring, performance tuning Security & Testing - Unit testing, Polaris, Coverity, SAST, DAST, threat modeling Data & Cloud - SQL Server, Azure Tooling - Visual Studio, VS Code, GitHub, GitHub Actions, Docker ✅ Why clients choose to work with me ✨ I think like a long-term .NET Developer, not a short-term task runner ✨ I write C# code that other C# developers can actually maintain ✨ I’m comfortable owning systems as a .NET Full Stack Developer ✨ I communicate clearly and avoid surprises ✨ I leave .NET full stack codebases cleaner and more stable than I found them 📌 Availability ✅ Available now 🌍 Remote-only ⏱️ Open to long-term collaboration If you’re looking for a .NET Developer, who can step into an existing system and improve it safely let’s chat. 👉 Send a message and we’ll review your setup together.

𝐌𝐨𝐬𝐭 𝐌𝐄𝐑𝐍 𝐚𝐩𝐩𝐬 𝐝𝐨𝐧’𝐭 𝐟𝐚𝐢𝐥 𝐛𝐞𝐜𝐚𝐮𝐬𝐞 𝐨𝐟 𝐟𝐞𝐚𝐭𝐮𝐫𝐞𝐬. They fail because of slow performance, poor architecture, and unscalable code. I'm a Full Stack developer specializing in production-ready SaaS platforms and Electron.js desktop apps — built with React, Next.js, Node.js, MongoDB, and TypeScript. I've shipped 50+ live systems used by real customers daily, including ISP management SaaS, clinic management systems, B2B marketplaces, and cross-platform desktop tools for Windows, macOS, and Linux. What I build: — MERN Stack SaaS platforms & admin systems — Electron.js cross-platform desktop applications — React / Next.js frontends with SSR & performance optimization — Node.js / NestJS backend APIs & microservices — Real-time features (WebSockets, socket. io) — AI integrations (OpenAI, ChatGPT inside web apps) — Stripe, Firebase, HubSpot & third-party API integrations Every new client gets a free 30-minute architecture audit before development starts — so we build the right thing from day one, not refactor it later. Top Rated | 93% Job Success | 6+ years | 25 completed contracts Message me and let's talk about your project.

Senior .NET developer with 25+ years of hands-on experience working on real production systems. I help companies stabilize, modernize, and extend desktop and legacy .NET applications, taking ownership of existing codebases and delivering clean, maintainable solutions that work reliably long-term. Most of my work involves improving existing Windows desktop applications rather than building throwaway prototypes. I regularly take over mature or poorly documented systems, identify structural and stability issues, and extend functionality without disrupting production workflows. Clients usually come to me when a system is business-critical and needs careful, senior-level handling. My core expertise is in Windows desktop development using C#, WPF, WinForms, and the .NET Framework. I also have extensive experience supporting and modernizing legacy systems built with VB.NET, VBA, C++, and Delphi, including Office automation, custom installers, file system integration, and data-processing tools. For modernization and supporting services, I work with .NET Core, ASP.NET, Razor Pages, and REST APIs, which allows me to evolve legacy desktop systems, build internal web tools, or deliver complete end-to-end solutions when needed. I follow proven architectural practices such as MVVM, layered design, version control with Git, and predictable deployment processes. I’ve completed 120+ projects and 37,000+ hours on Upwork, working primarily on long-term and technically demanding systems where reliability, clarity, and ownership matter more than quick fixes. If you’re looking for a dependable senior .NET developer who can take responsibility for an existing system or build a stable desktop application from scratch, I’d be happy to discuss your project.

Hi, I'm Jemin Padsala 👋 A successful mobile app is more than just great design.It should be fast, scalable, secure, easy to maintain, and built to support your business as it grows. That's exactly what I help my clients build. I'm a Flutter Developer with 5+ years of experience building modern Flutter Mobile Applications for startups, founders, entrepreneurs, agencies, and businesses worldwide. As a Flutter App Developer and Mobile App Developer, I develop high-quality applications for Android, iOS, Web, and Desktop using a single Flutter codebase that reduces development costs, speeds up delivery, and provides a consistent experience across every platform. I don't just write code. I help transform ideas into successful digital products. Whether you're building an MVP, launching a SaaS platform, creating an AI-powered mobile application, improving an existing Flutter app, or adding new features, I'm here to help you build a reliable product that users love. ⭐ Why Clients Choose Me Many developers focus on completing tasks. I focus on building products that help businesses grow. When you work with me, you get: ➤ 5+ Years of Flutter Development Experience ➤ 100% Job Success on Upwork ➤ 5-Star Client Satisfaction ➤ Clean, Scalable & Maintainable Code ➤ Production-Ready Mobile Applications ➤ Modern & Responsive UI ➤ Strong Clean Architecture ➤ Business-Focused Development ➤ Fast Communication & Regular Updates ➤ Reliable Delivery ➤ Long-Term Support & Maintenance ➤ Quality-First Development Before writing the first line of code, I think about how your application will perform today, six months from now, and years into the future. Because building it correctly the first time saves both time and money. What I Can Build ➥ Flutter Mobile Applications ➥ Android Applications ➥ iOS Applications ➥ Cross-Platform Mobile Applications ➥ Hybrid Mobile Applications ➥ Flutter Web Applications ➥ Flutter Desktop Applications ➥ FlutterFlow Applications ➥ MVP Development ➥ Startup Applications ➥ SaaS Platforms ➥ AI Mobile Applications ➥ AI Chatbot Applications ➥ Enterprise Applications ➥ Marketplace Applications ➥ E-commerce Applications ➥ Healthcare Applications ➥ Fintech Applications ➥ Education Platforms ➥ Food Delivery Applications ➥ Logistics Applications ➥ Travel Applications ➥ Real Estate Applications ➥ Social Networking Applications ➥ Chat Applications ➥ Video Calling Applications ➥ Live Tracking Applications Technical Expertise ✦ Flutter Development Flutter • Dart • FlutterFlow • Android • iOS • Flutter Web • Desktop Applications • Cross-Platform Development ✦ Architecture & State Management Clean Architecture • MVVM • MVC • Repository Pattern • SOLID Principles • Dependency Injection • BLoC • Cubit • Riverpod • Provider • GetX ✦ Backend & API Integration REST API • GraphQL • Firebase • Supabase • JSON • Dio • HTTP • WebSockets • SocketIO • gRPC • Third-Party APIs • Real-Time Synchronization ✦ Firebase & Cloud Firebase Authentication • Cloud Firestore • Realtime Database • Firebase Storage • Firebase Cloud Messaging (FCM) • Firebase Analytics • Crashlytics • Remote Config ✦ AI Integration OpenAI API • ChatGPT Integration • Gemini API • AI Chatbots • AI Assistants • Speech-to-Text • Text-to-Speech • AI Recommendations ✦ Payments Stripe • Razorpay • RevenueCat • PayPal • Apple Pay • Google Pay • In-App Purchases • Subscription Systems ✦ Authentication & Security OAuth • Google Login • Apple Login • Facebook Login • JWT • Secure Storage • SSL Pinning • Biometric Authentication ✦ Maps & Location Google Maps • Mapbox • Live Tracking • Geolocation • Places API • Route Optimization • Geofencing ✦ Local Storage SQLite • Hive • Isar • SharedPreferences • Flutter Secure Storage ✦ UI / UX Responsive UI • Material Design • Cupertino Design • Adaptive Layouts • Custom UI • Lottie • Hero Animations • Smooth User Experience ✦ Performance Optimization Clean Code • Code Refactoring • Memory Optimization • Lazy Loading • Pagination • App Size Optimization • Performance Tuning • Bug Fixing ✦ Advanced Features Chat • Video Calling • Live Streaming • Push Notifications • Offline Mode • Deep Linking • Dynamic Links • Camera Integration • QR Scanner • BLE • IoT • Background Services • Multi-language • Dark Mode ✦ Tools Git • GitHub • GitLab • Bitbucket • CI/CD • Codemagic • GitHub Actions • Bitrise • Jira • Trello • Postman • Figma Industries I Work With ✔ AI & Automation ✔ SaaS ✔ Healthcare & Telemedicine ✔ Fintech & Banking ✔ E-commerce & Marketplace ✔ Education & EdTech ✔ Food Delivery ✔ Logistics & Transportation ✔ Travel & Hospitality ✔ Real Estate ✔ Fitness & Wellness ✔ Social Networking ✔ Booking Platforms ✔ On-Demand Services ✔ CRM & Business Management ✔ Sports & Entertainment ✔ IoT Applications 📩 Send me a message and let's discuss your idea. Together, we'll build a fast, scalable, and high-quality application that delivers real value to your users and helps your business grow.

If your business has outgrown packaged software, I build what fits — custom, end-to-end solutions designed around your exact processes. Since 2006, I've delivered bespoke software across 8+ countries for clients ranging from global enterprises to funded startups. I currently maintain active support contracts with Vodafone and Philip Morris International, and have built and shipped products in logistics, fintech, agriculture, manufacturing, real estate, maritime, and SaaS. What I bring that most developers don't: — I've sat inside IT departments of large corporations, so I understand how decisions are actually made and what "production-ready" really means. — I've founded multiple software ventures of my own, so I understand the pressure of building something that has to work from day one. — I work across the full stack: mobile (Expo / React Native), web, desktop, backend APIs, cloud infrastructure (Azure, AWS), databases (MSSQL, Supabase, PostgreSQL), and third-party integrations (Stripe, open banking, ERP systems, barcode/IoT, and more). — I own physical iOS, Android, macOS, and Windows devices — every build is tested on real hardware. I work in structured weekly milestones with written updates, clear communication, and no surprises. My clients stay with me long-term because the work is done properly the first time. If you have a project that needs to be built right — not just built fast — I'd like to hear about it. Countries where I gained international experience: ● United States 🇺🇸 ● Australia 🇦🇺 ● Canada 🇨🇦 ● United Kingdom 🇬🇧 ● Chile 🇨🇱 ● China 🇭🇰 ● México 🇲🇽 ● Netherlands 🇳🇱 ● Turkey 🇹🇷 Development devices: - Dell XPS i7 16GB - Macbook Pro i7 32GB - Macbook Pro M1 16GB - Asus Thin Client Test PC - iPhone & iPad Devices - Android Devices - Zebra Barcode Scanner - DS2208 - Zebra Label Barcode Printer - ZD220 - Benq p50 Pocket PC Windows CE (Windows Mobile v5.0 and v6.5) Development Tool and Skills: ● C# / VB .NET / .NET Core / .NET Framework / Entity Framework / XAML / Blazor / LINQ / SQL / MVC / MVVVM / WinForms / WPF / UWP / Xamarin / MAUI / ASP.NET / WindowsCE Pocket PC / ZPL / XML / JSON / JS / AI / React Native / Expo / React ● Microsoft SQL Server / SQLite / PostgreSQL / MS Access / MS LocalDB ● Azure DevOps / AWS / Heroku / RESTful API / SOAP / Web Services / .NET Core Web API ● Docker / Postman / Git / TFS / SVN / GitHub / Jira / Trello / Microsoft Teams / Microsoft Dynamics / Visual Studio / Microsoft SQL Management Studio / Azure Data Studio / SAP ● DevExpress / Telerik / Syncfusion

Your product may look ready on the surface, but real users test it differently. They switch devices, take unexpected paths, enter unusual data, use slow connections, and reach integrations your team may not test every day. That is where I come in. I help SaaS, web, and mobile teams catch usability gaps, functional problems, device-specific behavior, weak edge-case handling, and API inconsistencies before customers experience them. I am a QA Engineer with 4+ years of professional experience testing web, iOS, Android, and desktop applications. My work combines detailed manual testing with automation testing support using Cypress and Playwright, API validation through Postman, and practical cross-browser and real-device testing. Clients hire me when they need more than someone who clicks through screens. I study the product, understand the user journey, test the happy path and the uncomfortable paths, document findings clearly, and help the team know exactly what should be checked before release. I can support you with: • Functional, regression, smoke, exploratory, integration, end-to-end, usability, and UI/UX testing • Web application testing across browsers, screen sizes, and user roles • Mobile app testing on real iOS and Android devices • API testing and validation with Postman • Cypress and Playwright automation testing support for repeatable regression coverage • Test plans, test cases, checklists, release testing, and acceptance testing • Clear Jira, ClickUp, Trello, Linear, or Google Sheets reporting with screenshots, recordings, expected results, actual results, and reproducible steps • Performance testing using JMeter and LoadRunner • CI/CD testing support and collaboration with developers in Agile teams I test on real devices, including Windows 11, macOS, iPhone XS, iPhone 14 Plus, iPhone 16 Pro Max, iPad 10th Generation, Google Pixel 7, and Samsung S22. This helps me validate the product experience beyond browser emulators alone. My recent clients have specifically appreciated my detailed reports, screen recordings, fast communication, reliable execution, and ability to explain findings clearly so developers can act on them without back-and-forth. Whether you need a complete QA pass before launch, ongoing regression coverage, mobile app validation, API testing, or an extra QA resource for your team, I bring a structured process, strong product thinking, and careful attention to user experience. Let’s make sure your users meet a polished product, not unfinished behavior. Relevant Skill: Manual Testing, Functional Testing, Software QA, Software Testing, Usability Testing, Web Testing, Mobile App Testing, Bug Reports, Desktop Application Testing, Test Results & Analysis, Bug Tracking & Reports, Automated Testing, Annotated Screenshot, Performance Testing, End-to-End Testing, Test Case Design, Android ,English, API Testing, QA, Testing