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I help individuals, startups, SMBs, and enterprises build reliable, scalable, and user-friendly .NET applications. With 12+ years of experience in custom software development, I specialize in transforming ideas into high-performing desktop, web, and mobile solutions that drive measurable business results. ➜ 𝐖𝐡𝐚𝐭 𝐈 𝐃𝐨 𝐟𝐨𝐫 𝐘𝐨𝐮 You’ll get more than just coding support — I ensure your software is: • Reliable & Scalable → Built on robust .NET architecture. • User-Friendly → Clean UI/UX for smooth adoption. • Future-Proof → Modern technologies and maintainable code. • On-Time → Agile approach with frequent updates and demos. ➜ 𝐌𝐲 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 • Desktop Apps: WPF, WinUI 3, UWP • Mobile Apps: Xamarin, MAUI • Backend & Frameworks: .NET Core, .NET 5/6/8, .NET Framework (3.5+) • Architectures: MVVM, MVC, PRISM, Singleton, n-Tier, Dependency Injection • Databases: SQL Server, SQLite, MySQL, Oracle • Integrations: Google APIs, Social APIs (Facebook, Twitter, LinkedIn) • UI/Controls: DevExpress, SyncFusion, Telerik ➜ 𝐖𝐡𝐨 𝐈 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 • Startups looking to launch MVPs • SMEs modernizing legacy systems • Enterprises needing robust desktop, web, or mobile apps • B2B & B2C businesses seeking tailored software solutions ➜ 𝐌𝐲 𝐏𝐫𝐨𝐜𝐞𝐬𝐬 1. Understand your goals & requirements 2. Propose the most effective technical approach 3. Share similar past work & align expectations 4. Start with a pilot milestone (risk-free) 5. Provide regular updates, demos, and post-deployment support ➜ 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐂𝐡𝐨𝐨𝐬𝐞 𝐌𝐞 • Top Rated Plus on Upwork with 100% Job Success Score • Client-Centric Approach: clear communication, flexible engagement • Confidentiality Assured: NDA & secure contracts • Proven Track Record: worked with startups and global enterprises • Easy Collaboration: available via Skype, Teams, Slack, Zoom I’m not just a developer—I’m a partner in your project’s success. My commitment to understanding your goals and providing ongoing support reflects my dedication to achieving the best outcomes for you. Let’s work together to create something extraordinary. Updating an existing app, or building something from the ground up — drop me a message, it is free to talk it over.

Focused & result-driven Full Stack IT Software professional with nearly 17 years of experience in Design, Development, Deployment, Debugging, Testing and Troubleshooting of application in desktop , web and mobile .Net Core Skills : .Net, WPF, C#, MVVM, MAUI, Asp.Net Core, WebApi, Microservices, Azure etc AI Core Skills : Python, AI/ML, RAG Agents, LLM, Open AI, LangChain,Fast API, Vapi, n8n etc Tools : VS 2022, CoPilot, Claude Code, SQL, PostgreSql etc Excellence in gathering and understanding requirements of clients & other multiple stakeholders (at strategic and tactical levels), followed by translation into functional specifications as well as provisioning of suitable solutions Extensively worked in Agile, CI/CD, GIT, TFS etc Engaged in various phases of Product Development Life Cycle from analyzing requirements specifications, high level design, user story development, Implementation, unit testing, defect fixing, Code reviews and production support maintenance An effective Sr. Developer and leader with proven skills in development and leading teams during the project phase; holds expertise in managing & supporting the clients

• 14+ years of experience • I work on backend, frontend, databases, and Linux server administration • Main stack: .NET (C#) and TypeScript / JavaScript • I build web and multi-platform desktop/mobile applications 📚 Technologies • My main tech stack is .NET (C# or .NET) and TypeScript / JavaScript • For .NET, I work with ASP .NET, Blazor, WPF, Windows Forms, MAUI (formerly Xamarin), Avalonia UI, and more • For TypeScript / JavaScript, I prefer React, but I can also work with Angular, jQuery, or vanilla JS 🗼 Server Administration and DevOps • Familiar with Debian-based Linux distributions like Ubuntu • Able to handle VPS baremetal or Docker-based setups • Able to automate workflows using Bash, Python, GitHub Actions, and similar tools • Experienced with cloud services such as AWS and Azure 📊 Database • Microsoft SQL Server • MySQL / MariaDB • SQLite • PostgreSQL • Microsoft Access 💡 Skills • Strong in algorithm design and analysis • Great ability to solve programming and system trouble • Great at optimizing software performance • Flexible work style • Adaptive team player 📖 Self-Update • I regularly study new technologies to stay up to date. 🕰️ Flexible Availability • Open to collaborate across multiple time zones (US, CA, UK, EU, APAC, etc.) ✅ I’m not a robot. • I’m a real human and a solo freelancer, not an agency 🙌 Let’s Connect! • My name is Ragavan and I’d love to help bring your ideas to life • Feel free to reach out so we can discuss how I can support your project • Not a Vibe Coder, but use AI-Assisted Programming tools to solve problems • Linus Torvalds once said, “Talk is cheap. Show me the code.” So go ahead and check out my GitHub code. 🛠️ Common Tasks and Roles • Known as the Apple / macOS / iPhone guy • Build Windows app with .NET Framework & Windows Forms (WinForms) / Windows Presentation Foundation (WPF) / WinUI / Avalonia UI / MAUI / Xamarin • Build Windows Installer MSI / EXE from existing Windows App by using Wix / WixSharp • Build macOS app with Swift UI or .NET & Avalonia UI / MAUI / Xamarin • Build, sign, and notarize macOS app installer (PKG / DMG / ZIP) • Build web app with ASP .NET & Blazor / React / Angular / Vanilla JavaScript • Deploy and configure existing web apps by using Docker container to VPS / Cloud providers like AWS, Azure, or GCP • Ethical decompile / reverse engineer / source code retrieval / deobfuscation of existing .NET EXE / DLL / MSI or NinjaTrader Trading Indicator / strategy • Automate Windows UI tasks • Web scraping to retrieve online data / PDF / Images / any other files • Expert macOS system and app troubleshooting 🙋‍♂️ What I'm not • I'm not a Vibe Coder. Don't get me wrong, I use AI to build software, but I don't solely rely on it.

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.

Experienced in Microsoft technologies, C,C++, Dot Net, VSTO Add-ins, SCM, Build management, and Installers. Highly skilled, experienced, and working full-time individually, with 14,000 hours of work. I have developed more than 20 commercial-grade Office add-ins for the desktop edition of Microsoft Office. I am skilled in enhancing and fixing web-based MS Office add-ins. Besides development and design, have strong troubleshooting and debugging skills and exposure to the Windows stack - from Office Addins, traditional Windows applications, client/server applications, windows services, COM components, Win 32 API, COM, ATL, installer technology, etc. Languages/Frameworks - Dot Net, C#, Python, VB.Net, C/C++, Win32 SDK/API, COM/ATL, MFC. SCM tools - Git, SVN, TFS, Perforce, Dev Tools - Visual Studio, Eclipse Database - Microsoft SQL Server, Microsoft Access, MySQL Web - ASP, JavaScript, IIS, COM/DCOM, HTML/DHTML, XML, CSS, Installation tools : InstallShield, Install, NSIS, Advanced Installer, InstallAnywhere, Inno Setup, Wix, ClickOnce, MSI, Orca Tools/Others - MS Office automation, VSTO Add-ins for Outlook, Excel, Word, PowerPoint

If you can think of a problem, I can engineer the solution. My career has been built on tackling projects where mathematics, performance, and reliability collide. From deep computational geometry to real-time imaging pipelines and AI breakthroughs, I bring algorithmic thinking into production-grade systems. What I Make Possible Computational Geometry & Simulation (CUDA): Architected a real-time electric field line simulator on GPUs, handling the dense math behind vector fields and parallel kernels. Delivered BIM-style geometry evaluation and Bezier-based drawing tools for clients who needed accuracy, interactivity, and stability at scale. Interactive Geometry Tools: Distinguished performer in delivering CAD-like solutions — room planning engines, floorplan canvases, and curve editors that match the sophistication of industry BIM systems. AI/ML (Computer Vision & OCR): Outperformed Tesseract and other baselines in image classification and OCR by building custom ML.NET and PyTorch pipelines. Leveraged trained models for chemistry-focused OCR, decoding molecular diagrams and classifying scientific data that generic engines couldn’t touch. MVVM & Real-Time Imaging: Built a live-view imaging pipeline in C#/WPF with sub-30ms latency, sustaining real-time overlays without freezing the UI by combining async/await with multithreading. I’m not just about ViewModels and data binding — I handle what most developers would call impossible to fold into MVVM, structuring complex rendering logic, continuous device streams, and performance-critical updates cleanly into responsive applications. Backend Architecture (ASP.NET Core): Built a search engine that transformed OCR’d exam content into queryable data for JEE/Olympiad problems, returning matches and solutions with precision. Secured APIs with Microsoft Identity + JWT for robust user management. XAML Engineering: Designed custom bindable controls — battery meters, temperature indicators, sound meters — powered directly by live camera and device data. Beyond templates, I create reusable controls that extend the XAML ecosystem. Algorithm Design: From extracting clean outlines from noisy contours to detecting bonds in chemical structures, I specialize in solving problems where raw data needs to become usable intelligence. Security & DevOps: Full-stack capability in authentication/authorization, user management APIs, and CI/CD pipelines to keep delivery seamless and production-ready. Beyond the Obvious If you can imagine extracting complex geometrical details from a live camera feed, training an AI model on that data, and rendering it in real-time with OpenGL/WebGL/WPF — I can deliver it or even make it interactable. This is just a mad example; the possibilities are much wider — not limited to camera or geometry, but really about what you can imagine when these skills combine, powered by my foundation in mathematics, computational geometry, CUDA, and AI. Recognition I am Expert-Vetted on Upwork, officially ranked among the top 920 freelancers worldwide in 2024 — a distinction far more selective than “top 1%.” This represents consistent success on high-stakes, algorithm-heavy projects with global clients. Skills & Tools C#, .NET, ASP.NET Core, REST APIs, Microsoft Identity, JWT Authentication, SignalR, EF Core, LINQ, MongoDB, Azure, Docker, Microservices WPF, WinUI 3, UWP, Uno Platform, MAUI, XAML, Custom Controls, MVVM, Real-Time Imaging, UI/UX for Desktop C++, CUDA, GPU Acceleration, High-Performance Computing (HPC), Parallel Computing, OpenGL, GLSL, CUDA-OpenGL Interoperability Computational Geometry, Physics Simulation, Algorithm Design, Contour Extraction, Data Structures & Optimization Machine Learning, Deep Learning, Computer Vision, OCR, Data-Driven Modeling, PyTorch, TorchVision Performance Optimization, Clean Architecture, Multithreading, Async/Await, CI/CD Pipelines, DevOps