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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 ➡️ 𝐋𝐞𝐠𝐚𝐜𝐲 𝐒𝐲𝐬𝐭𝐞𝐦 𝐑𝐞𝐬𝐜𝐮𝐞 & 𝐌𝐨𝐝𝐞𝐫𝐧𝐢𝐳𝐚𝐭𝐢𝐨𝐧 Outdated software dragging you down?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. 🚀

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.

I'm a versatile solution-oriented Full Stack Web Developer with AI integration expertise, helping business build high-performance, secure, scalable and production ready web applications that actually solve business problems. Whether you need complete end-to-end SaaS platform, Custom web apps, admin dashboard, chatbots, RAG systems, and LLM-integrated workflows or need a trusted developer for ongoing work — I'm here to help from concept to deployment and ready to take ownership of the project from start to launch.. I deliver clean, maintainable code with clear communication and on-time results. 🔹 𝐖𝐡𝐚𝐭 𝐈 𝐃𝐨 • Develop end-to-end web applications using modern frameworks and best practices. • Build robust REST APIs and microservices with secure, scalable architecture. • Integrate AI-powered workflows using tools like LangChain and vector databases. • Optimize databases for high performance and efficiency. • Deliver production-ready and scalable solutions tailored to your business goals . • In simple term, Basically I do Web Development, AI & Chatbot Integration and Desktop Development. 🚀 𝐂𝐨𝐫𝐞 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 ✅ 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 • 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝: React.js, Next.js, Blazor, ASP.NET Razor Pages , Bootstrap, Tailwind CSS, ShadcnUI • 𝐁𝐚𝐜𝐤𝐞𝐧𝐝: Node.js, Express, ASP.NET Core, ASP.NET MVC/Web API, FastAPI, Django, Flask • 𝐏𝐫𝐨𝐠𝐫𝐚𝐦𝐦𝐢𝐧𝐠 𝐋𝐚𝐧𝐠𝐮𝐚𝐠𝐞𝐬 : C#, JavaScript, TypeScript and Python • 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞: Clean Architecture, Microservices, Serverless, Multi-tenant SaaS, N-Tier (Desktop) • 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 : xUnit, NUnit, Jest, PyTest, Playwright, Selenium ✅ 𝐋𝐋𝐌 𝐒𝐭𝐚𝐜𝐤 • 𝐋𝐋𝐌 𝐏𝐫𝐨𝐯𝐢𝐝𝐞𝐫𝐬: OpenAI API, Anthropic Claude, Google Gemini, Vercel SDK, Qwen • 𝐅𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬: LangChain, LlamaIndex, Semantic Kernel (.NET), CrewAI, AutoGen • 𝐕𝐞𝐜𝐭𝐨𝐫 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬: Supabase, pgvector, Pinecone, Chromadb • 𝐑𝐞𝐚𝐥-𝐓𝐢𝐦𝐞: SignalR, WebSockets, Server-Sent Events for live AI interactions ✅ 𝐀𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 • AI-assisted development with OpenRouter, Codex, and Claude • Intelligent workflows using LangChain & Pinecone • Vector search, automation, and smart data pipelines • Python (APIs, AI integrations) • storing, embedding, and retrieving data for RAG • allow the LLM to access up-to-date, specialized data. ✅ 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 & 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 • SQL Server, PostgreSQL, MySQL, MongoDB, Redis, Prisma, Entity Framework Core • Advanced T-SQL, Query optimization & schema design for high performance ✅ 𝐀𝐏𝐈𝐬 & 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬 • API development and third-party integrations • RESTful API design with OpenAPI/Swagger documentation • Payment integrations with Stripe, PayPal, Razorpay • Twilio, SendGrid integration • GraphQL, gRPC ✅ 𝐂𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬 • AWS (EC2, S3, RDS, CloudFront, SES) • Azure & Vercel deployments • CI/CD pipelines: GitHub Actions, GitLab CI/CD, AWS CodePipeline • Docker, Linux server management • Monitoring: Datadog, Sentry, AWS CloudWatch ✅ 𝐀𝐝𝐝𝐢𝐭𝐢𝐨𝐧𝐚𝐥 𝐒𝐭𝐫𝐞𝐧𝐠𝐭𝐡𝐬 • System Design & Architecture • Clean code, SOLID principles, DRY, scalable system design • Authentication & Security: JWT, OAuth, Role-based systems, secure coding practices • Familiarity with headless CMS (e.g., Strapi, Contentful, Sanity, PayloadCMS) • SEO & performance optimization • Automated testing & debugging • Third-party API integrations • AI/ML API integration (OpenAI, custom ML models) 💻 𝐖𝐡𝐚𝐭 𝐘𝐨𝐮 𝐂𝐚𝐧 𝐄𝐱𝐩𝐞𝐜𝐭 • Clean, maintainable, and well-documented code • Strong communication & collaboration throughout the project • Ability to build projects from scratch or improve existing systems • Focus on performance, scalability, and reliability • A developer who is adaptable and quick to learn new technologies 💻 𝐖𝐡𝐚𝐭 𝐈 𝐂𝐚𝐧 𝐇𝐞𝐥𝐩 𝐘𝐨𝐮 𝐁𝐮𝐢𝐥𝐝 ✔ Fast, super responsive, and modern web applications ✔ AI-Integrated Custom Web Applications (from scratch or existing) ✔ SaaS Platforms (multi-tenant, scalable systems) ✔ E-Commerce Platform ✔ REST APIs & Enterprise-Grade Backend Systems ✔ Modern, Responsive Frontends ✔ Admin panels and Data-driven dashboards for smarter decision-making ✔ Traditional Full Stack Development without AI ✔ Enterprise Software Solutions (.NET-based systems) ✔ Database Design & Optimization ✔ Create desktop applications using Winform, WPF(MVVM) and Electron.js ✔ AI-Powered Customer Support Portal | C# Backend + OpenAI Integration ✔ RAG & Custom AI Agents: Private-data-aware LLM systems ✔ Custom Chatbots & Conversational AI & Prompt Engineering Tools 🔹 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐀𝐩𝐩𝐫𝐨𝐚𝐜𝐡 1. Understand your goals (not just features) 2. Plan system design & architecture 3. Develop with best practices 4. Test & optimize performance 5. Deploy & support

⭐ Top Rated Plus | $400K+ Earned | 23,000+ Hours | 100% Job Success I help businesses build, scale, and modernize .NET applications — from legacy ASP.NET Web Forms migrations to high-performance enterprise systems handling 300GB+ databases. Over 14 years, I've delivered 89+ projects on Upwork with consistent 5-star results, including a 1,300+ hour engagement with a single client who kept coming back. What I bring to your project: 🔹 Full-Stack .NET Expertise — ASP.NET (Web Forms, MVC, Core), C#, Web API/REST, Entity Framework, LINQ 🔹 SQL Server Performance Specialist — Complex queries, stored procedures, query optimization, and scaling databases to 300GB+ 🔹 Modern Front-End — Angular, Vue.js, React, Blazor, TypeScript, Tailwind, Bootstrap 🔹 Cloud & DevOps — Azure, AWS, GCP, Azure DevOps, CI/CD pipelines, Git 🔹 Integrations — PayPal, Stripe, third-party APIs, MongoDB, CosmosDB Why clients rehire me: ✅ Clear, proactive communication (0–4 hour response time) ✅ Writing clean, maintainable, well-tested code ✅ Leading teams, mentoring developers, and reviewing code at enterprise standards ✅ Solving hard problems — not just "making it work" Whether you need a new application built from scratch, a legacy system modernized, or a senior engineer to unblock your team — let's talk. I'll respond within 4 hours.

Specializing in C#, .NET Ecosystem, Hardware Integration & Office Automation If you are looking for a developer who can bridge the gap between sophisticated web interfaces, high-performance desktop systems, and physical hardware—you are in the right place. With 12+ years of experience, I architect "mission-critical" solutions designed for longevity, whether they live in the cloud or on a local workstation. ⭐ "Subhodeep is an excellent programmer... Clean code, in sync with architecture." ⭐ "I am very impressed by Mr. Bhattacharjee's professional programming skill... Very satisfied and thankful." 🔹 Why I am the Top Choice for Your Project While many developers specialize in only one area, I offer a unified approach to the Microsoft stack. My solutions are famous for their longevity—many of my enterprise applications have been running glitch-free for 12+ years in high-pressure production environments. I provide the stability of a desktop expert with the modern flexibility of a web developer. 🛠 Technical Arsenal 1. Enterprise Web Development Modern Core: Architecting scalable web apps using ASP.NET Core and MVC. Frontend Mastery: Creating responsive UIs with React, JavaScript, and jQuery. Legacy Support: Maintaining and modernizing ASP.NET WebForms applications. 2. Advanced Windows UI/UX Development WPF (MVVM): High-performance, modern interfaces with complex data binding. WinForms: Legacy-to-modern migrations and rapid, stable business tools. Enterprise Toolkits: Expert-level implementation of DevExpress and Telerik. MAUI: Extending desktop power to cross-platform mobile environments. 3. Hardware & Industrial Integration Communication: Deep mastery of TCP/IP, RS-232, and Serial Port protocols. Peripherals: Seamless integration for RFID Readers, Barcode Scanners, and industrial sensors. 4. Microsoft Office Automation (VSTO) Custom enterprise-grade Add-ins for Excel, Outlook, Word, and PowerPoint. Creating seamless bridges between Office tools and internal databases. 5. Data Architecture & Smart Logic Databases: SQL Server, SQLite, and Entity Framework (Core & Full). Data Processing: Complex CSV, XML, and JSON manipulation at scale. ✅ The Guarantee of Senior-Level Engineering Zero Technical Debt: I write clean, maintainable code using SOLID principles. Full-Stack Ownership: From hardware handshakes and database design to the final Web API or Desktop UI. Architectural Precision: Focused on memory management, speed, and Windows API optimization. 🚀 Stop looking for multiple freelancers. Whether you need to digitize your entire operation, build a React-based dashboard for your desktop tools, or solve a complex hardware-software conflict, I will deliver a robust, future-ready solution. Let's discuss your project today!

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