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With 8+ years of extensive experience in software development, I specialize in building high performance, scalable, and user centric WEB and DESKTOP APPLICATIONS using modern technologies. My core expertise lies in Microsoft based development (.NET, C#, ASP.NET Core/MVC, Blazor), combined with modern frontend frameworks like React, Angular, and mapping/GIS tools including ArcGIS. I also have strong proficiency in working with a variety of databases, including SQL Server, PostgreSQL, Supabase, MySQL, and MongoDB; ensuring robust data modeling, performance tuning, and secure data handling across applications. Whether you need an enterprise-grade backend, interactive frontend interfaces, geospatial data integration, or a reliable full-stack partner, I bring the right blend of technical skill, professionalism, and client focused service. - Why Clients Hire Me: A. Proven Track Record – Top Rated, $100K+ earnings, and 90%+ long-term client retention. B. Strict Deadline Adherence – I consistently deliver on time, without compromising quality. C. Scalable, Clean Code – Maintainable, modular codebase following best practices. D. Exceptional Communication – Transparent, responsive, and proactive collaboration. - Technical Expertise: a. Backend: C#, ASP.NET Core/MVC, Web API, Node.js, Express.js, Blazor, OWIN, IIS b. Frontend: React, Angular, Razor, Next.js, Vue.js, Typescript, Bootstrap, Tailwind CSS, Kendo UI, jQuery c. GIS/Mapping: ArcGIS JavaScript API, ArcGIS REST services integration d. Databases: SQL Server, PostgreSQL, MySQL, Supabase, MongoDB e. Cloud/DevOps: Azure DevOps, AWS (S3, EC2, Lambda), GitHub Actions, Docker f. APIs & Integrations: REST, GraphQL, SOAP/WSDL, SSO/Auth systems Primary Skills (Core Stack): - Full Stack Developer - .NET Developer - ASP.NET Core Developer - C# Backend Developer - React.js Developer - Angular Developer - Blazor Developer - MAUI App Developer - .NET MAUI Developer - Web API Developer - Entity Framework Core - Razor Pages - SignalR Developer Frontend Technologies: - JavaScript Developer - TypeScript Developer - HTML5 / CSS3 / SCSS - Responsive Web Design - Tailwind CSS - Bootstrap - React Hooks - Angular Material - RxJS - Material UI (MUI) Backend / Server-Side - ASP.NET Core Web API - RESTful API Development - Microservices Architecture - Clean Architecture - Dependency Injection - Middleware in .NET - LINQ / EF Core - SQL Server / PostgreSQL / MySQL - IdentityServer / JWT Authentication Version Control & Tools: - Git / GitHub / GitLab / Bitbucket - Azure DevOps Pipelines - Jira / Trello / ClickUp - Visual Studio 2022 - Postman / Swagger - Figma to React/Angular Testing & Quality: - Unit Testing in .NET (xUnit, MSTest) - Jest for React - Cypress / Selenium - Playwright - Code Review & Refactoring Cloud & DevOps: - Azure Developer - AWS Developer - Azure App Services - Azure Functions - AWS Lambda - CI/CD (GitHub Actions, Azure DevOps) - Docker - Kubernetes - Cloudflare I work with different technologies and like complex and long-term projects, my experience allows me to solve complex problems related to the design of the project during the negotiation phase. I prefer long-term cooperation with the client and therefore try to provide maximum comfort and quality.

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.

Hi 👋 I'm Jeetendra Sharma, a complete-package technologist with 20+ years of hands-on experience designing, building, and scaling software solutions, web applications, and desktop systems across nearly every business domain you can name. I don't just write code. I lead, automate, architect, deploy, and manage teams, and now, with AI woven into my workflow, I deliver in a fraction of the time without cutting a single corner. Hire me once, and you replace an entire tech department. ⚡ 🏆 20+ Years of Production-Grade Delivery ⭐ Cross-Domain Software Expert ✅ AI-Powered Development Specialist ✅ End-to-End Ownership — Idea → Launch → Long-Term Support 𝐖𝐡𝐚𝐭 𝐈 𝐁𝐮𝐢𝐥𝐝 𝐅𝐨𝐫 𝐘𝐨𝐮𝐫 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬: ➡️ 𝐀𝐈-𝐏𝐨𝐰𝐞𝐫𝐞𝐝 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 Smart automations, AI assistants, document intelligence, and Claude/ChatGPT-driven features built directly into your products and operations to cut manual work by 60-80%. ➡️ 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐒𝐞𝐭𝐮𝐩 𝐅𝐫𝐨𝐦 𝐙𝐞𝐫𝐨 Choosing your stack, wiring your tools, automating your processes, training your team I get your entire tech foundation right the first time so you don't pay twice. ➡️ 𝐂𝐫𝐨𝐬𝐬-𝐃𝐨𝐦𝐚𝐢𝐧 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐲 Two decades of shipping for e-commerce manufacturing, healthcare, education, logistics, retail, real estate, and finance. Chances are I've already solved a problem just like yours. ➡️ 𝐂𝐮𝐬𝐭𝐨𝐦 𝐖𝐞𝐛 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 Customer portals, dashboards, internal tools, marketplaces, a booking platforms fully tailored to how your business actually operates, not a generic template. ➡️ 𝐃𝐞𝐬𝐤𝐭𝐨𝐩 𝐒𝐨𝐟𝐭𝐰𝐚𝐫𝐞 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 Windows-based business tools, POS systems, inventory software, accounting modules, and offline-first applications engineered for reliability in real-world environments. ➡️ 𝐋𝐞𝐠𝐚𝐜𝐲 𝐒𝐲𝐬𝐭𝐞𝐦 𝐑𝐞𝐬𝐜𝐮𝐞 & 𝐌𝐨𝐝𝐞𝐫𝐧𝐢𝐳𝐚𝐭𝐢𝐨𝐧 Outdated software dragging you down? I rebuild slow, fragile codebases into clean, modern architectures with zero disruption to what's already running. ➡️ 𝐓𝐞𝐚𝐦 𝐋𝐞𝐚𝐝𝐞𝐫𝐬𝐡𝐢𝐩 & 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐲 𝐎𝐰𝐧𝐞𝐫𝐬𝐡𝐢𝐩 Need scale? I bring a vetted team, the playbook, and the discipline to ship you get one accountable point of contact instead of five. 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐊𝐞𝐞𝐩 𝐂𝐡𝐨𝐨𝐬𝐢𝐧𝐠 𝐌𝐞: ✅ 𝐓𝐰𝐨 𝐃𝐞𝐜𝐚𝐝𝐞𝐬, 𝐙𝐞𝐫𝐨 𝐄𝐱𝐜𝐮𝐬𝐞𝐬: proven delivery for real businesses, not theory ✅ 𝐂𝐥𝐞𝐚𝐫, 𝐇𝐨𝐧𝐞𝐬𝐭 𝐂𝐨𝐦𝐦𝐮𝐧𝐢𝐜𝐚𝐭𝐢𝐨𝐧: straight talk, real timelines, no surprises ✅ 𝐀𝐈-𝐀𝐜𝐜𝐞𝐥𝐞𝐫𝐚𝐭𝐞𝐝 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐲: full systems shipped in a week, not a quarter ✅ 𝐁𝐮𝐢𝐥𝐭 𝐭𝐨 𝐋𝐚𝐬𝐭: projects from a decade ago still powering businesses today ✅ 𝐏𝐨𝐬𝐭-𝐋𝐚𝐮𝐧𝐜𝐡 𝐏𝐚𝐫𝐭𝐧𝐞𝐫𝐬𝐡𝐢𝐩: I stay involved long after delivery ✅ 𝐎𝐧𝐞 𝐇𝐢𝐫𝐞, 𝐄𝐯𝐞𝐫𝐲 𝐒𝐤𝐢𝐥𝐥: coder, architect, manager, AI strategist, sysadmin in one 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤: ⚡ 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 → React, Next.js, Angular, Bootstrap, TypeScript, Tailwind CSS ⚡ 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 → .NET & C# ⚡ 𝐃𝐞𝐬𝐤𝐭𝐨𝐩 → WPF, .NET Desktop Apps ⚡ 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 → MySQL, PostgreSQL, SQL Server, Firebase ⚡ 𝐂𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬 → AWS, Azure, Docker, CI/CD pipelines ⚡ 𝐂𝐌𝐒 & 𝐞𝐂𝐨𝐦𝐦𝐞𝐫𝐜𝐞 → PODStoreFront and Shopify 𝐀𝐈 𝐓𝐨𝐨𝐥𝐬 𝐈'𝐯𝐞 𝐌𝐚𝐬𝐭𝐞𝐫𝐞𝐝: ➤ Claude (Anthropic) — my daily driver for code, architecture, content ➤ ChatGPT & OpenAI APIs — automation, integrations, custom GPTs ➤ ClickUp AI — project orchestration and team workflow automation ➤ Cursor, Claude Code, GitHub Copilot — pair-coding at machine speed ➤ MCP servers & AI agent integrations — embedding intelligence into your stack 𝐑𝐞𝐚𝐥-𝐖𝐨𝐫𝐥𝐝 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 𝐈'𝐯𝐞 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐞𝐝: ✦ PODStoreFront: No-code ecommerce and POD storefront builder, built-in product customizer and other integrations. ✦ MDM: Automated warehouse system with PO generation, carrier integration, and serial tracking for fast, accurate logistics. ✦ Duplium: Smart Printer Suite unifying production control, inventory, and one-click invoicing for high-volume print operations. ✦ DR.Talk: HIPAA-compliant mobile platform for patient texting, dental chatbots, and curbside check-in. ✦ MarshallZehr: Intelligent fintech software automating lending workflows and analytics for real estate lenders. ✦ Speed Identity: Enterprise biometric system with fingerprint, signature, and multi-modal kiosk capture. ✦ LP Soul: Full-service POD eCommerce platform with custom product customizer and multi-currency admin for global apparel & accessories. 𝐖𝐡𝐚𝐭 𝐘𝐨𝐮'𝐥𝐥 𝐆𝐞𝐭 𝐖𝐨𝐫𝐤𝐢𝐧𝐠 𝐖𝐢𝐭𝐡 𝐌𝐞: ✔️ Software shaped around your business goals not a cookie-cutter build ✔️ Interfaces your users actually enjoy and your team can run without training ✔️ Backend systems that hold up under real load, not just demo conditions ✔️ Continuous post-launch support, updates, and optimization ✔️ One partner accountable for the whole journey — strategy through scale 📩 Send me a message or invite me to your project. Let's talk. 🚀

⭐⭐⭐⭐⭐ Top Rated | Senior .NET Desktop, ASP.NET Core, SQL Server, QuickBooks & SAP Crystal Reports Expert | 10+ Years I help businesses build, modernize, and optimize desktop applications, web systems, databases, and reporting solutions using Microsoft technologies. With over 10 years of experience, I've delivered enterprise software for manufacturers, wholesalers, accounting firms, and service businesses worldwide. I specialize in solving complex technical challenges—from fixing slow applications and optimizing SQL Server databases to integrating QuickBooks Desktop, developing SAP Business One Crystal Reports, and building complete ERP solutions. Whether you're starting a new project or maintaining a legacy system, I focus on clean architecture, performance, and long-term maintainability. 🔹 Core Expertise Desktop Development • C & VB.NET WinForms • DevExpress UI • Windows Services • Multi-threaded Applications • Modern Windows 11 UI • Desktop Performance Optimization Web Development • ASP.NET Core • RESTful Web APIs • Third-party API Integrations • OAuth Authentication • JSON & XML Processing Database Development • Microsoft SQL Server • T-SQL • Stored Procedures • Performance Tuning • Query Optimization • Index Optimization • Database Design • Data Migration • Import & Export Automation SAP Business One & Crystal Reports I have developed hundreds of Crystal Reports for SAP Business One, including: • Sales Orders • Purchase Orders • A/R & A/P Invoices • Delivery Notes • Inventory Reports • Production Reports • Financial Reports • Customer Statements • Aging Reports • Barcode Labels • Custom Business Reports I also specialize in: • PLD to Crystal Report Conversion • Crystal Report Customization • SQL-Based Reports • Report Optimization • Complex Formulas • Parameters & Subreports QuickBooks Desktop Integration • QBFC SDK • Customer Synchronization • Order Synchronization • Invoice Synchronization • Inventory Synchronization • Price Updates • Windows Background Services • Custom Accounting Integrations ERP & Business Automation • Inventory Management • ERP Development • Workflow Automation • Business Process Automation • Dashboard Development • Reporting Solutions Hardware Integration • Serial Port (RS232/RS485) • Bluetooth Communication • Industrial Equipment • Machine Automation • Real-time Monitoring Systems Legacy Modernization • VBA to .NET Migration • Excel Macro Conversion • Legacy Application Refactoring • Desktop Application Upgrades 🔹 Recent Projects ✔ Developed a complete ERP solution for the diamond industry handling high-volume daily transactions. ✔ Designed and developed hundreds of SAP Business One Crystal Reports and converted numerous PLD reports into Crystal Reports. ✔ Built an unattended QuickBooks Desktop synchronization application using the QBFC SDK to automatically synchronize customers, orders, invoices, inventory, and pricing. ✔ Developed a real-time manufacturing dashboard monitoring production across 15+ plants. ✔ Implemented a fully compliant Saudi Arabia ZATCA Phase 2 e-invoicing solution. ✔ Built coffee roaster control software integrating hardware through Serial Port and Bluetooth communication. ✔ Developed an automatic desktop application updater with database migration support. ✔ Migrated legacy Excel/VBA business systems into scalable .NET desktop applications. 🔹 Why Clients Hire Me ✔ 10+ years of professional experience ✔ Top Rated on Upwork ✔ Strong expertise across Desktop, Web, Database, Reporting, and Enterprise Integration ✔ Clean, maintainable, and scalable code ✔ Fast problem diagnosis and performance optimization ✔ Direct communication with the developer doing the work ✔ Reliable delivery and long-term support 🔹 Technologies Languages: C, VB.NET, SQL (T-SQL) Desktop: WinForms, DevExpress Web: ASP.NET Core, REST APIs Database: Microsoft SQL Server Reporting: SAP Business One, Crystal Reports, RDLC Accounting: QuickBooks Desktop (QBFC SDK) Other: REST APIs, JSON, XML, OAuth, Windows Services, Barcode Systems, Serial Communication, Bluetooth, VBA Modernization 📩 If you're looking for a developer who can build, optimize, or modernize your desktop application, SQL Server database, Crystal Reports, QuickBooks integration, or ERP system, I'd be happy to discuss your project. Send me a message, and let's build a reliable solution that scales with your business.

Real-world Windows Desktop Solutions Specialist I help companies with existing desktop systems — not prototypes — by improving stability, performance, and maintainability so your software keeps running smoothly and grows with your business. I specialize in: ✅ WinForms & WPF development & modernization ✅ DevExpress UI & large, performant grids ✅ Legacy system cleanups & feature additions ✅ Multithreading, async, performance tuning ✅ Integration, reporting & database workflows With 17+ years of experience on real production products — including trading systems, market-risk tools, and enterprise real-estate platforms — I solve hard desktop problems where others struggle. If your project has complexity, users, and ongoing needs — let’s talk about how I can bring reliability, performance, and clarity to your codebase.

I help businesses build enterprise-grade .NET desktop and integration solutions that connect software with healthcare systems, industrial hardware, and complex document standards. With over 15 years of professional experience, I have successfully delivered Windows desktop applications, enterprise web portals, workflow automation, and high-performance backend systems for clients in the USA, UK, and Australia. My primary areas of specialization include: ✔ .NET Desktop Development C# WPF WinForms .NET MAUI Windows Services Windows API Driver communication Hardware integration ✔ Healthcare EDI Integration ANSI X12 EDI 837P EDI 837I EDI 835 EDI 277 EDI 999 Clearinghouse integrations Healthcare billing workflows ✔ S1000D / DITA Technical Publications XML processing BREX Data Modules Descript Proced IPD Fault Isolation Schema validation XSLT Publishing automation ✔ Biometric & Device Integration ZKTeco eSSL Mantra Cogent Suprema Safran Fingerprint SDKs Attendance systems USB and serial device communication I also develop secure backend services and modern web applications using ASP.NET Core, Blazor, Entity Framework Core, SQL Server, REST APIs, GraphQL, Azure, and cloud-native architectures. Beyond software development, I have implemented intelligent automation using AI technologies including Retrieval-Augmented Generation (RAG), Large Language Models (LLMs), Azure OpenAI, Semantic Search, MCP, OCR, document processing, and workflow automation. Clients hire me because I focus on solving complex integration challenges that many developers avoid—whether it's communicating with specialized hardware, processing EDI transactions, implementing S1000D publishing workflows, or modernizing legacy Windows applications. If your project involves enterprise software, healthcare integrations, industrial devices, or mission-critical desktop applications, I'd be happy to discuss how I can help.