I’m a resourceful full-stack developer with 8+ years of experience building web, desktop, and mobile applications. My expertise lies in combining Microsoft technologies (.NET, C#, Azure) with modern frameworks (React, Angular, Node) and AI-powered solutions to deliver high-quality, scalable products. What I Offer: ✅ AI Development & Automation – Build intelligent, workflow-optimizing solutions using ChatGPT, Claude, Cursor, and custom automation. ✅ MCP Server Solutions – Implement secure, scalable, and context-aware AI integrations. ✅ Full-Stack Development – Expertise in ASP.Net Core, MVC, C#, Azure, MSSQL, MySQL, Firebase, MongoDB. ✅ API & Integrations – QuickBooks Online/Desktop, WebServices, Intuit Anywhere, RSS Feeds, CMS, Google APIs. ✅ Mapping & GIS – ArcGIS, Google Maps integration for data-driven applications. 💡 I specialize in delivering AI-enabled, business-focused applications that save time, cut costs, and unlock new capabilities. My approach is hands-on, detail-oriented, and focused on making your project a success. Let’s build something powerful together!

**SharePoint, Dynamics 365 & Power Platform** - 10+ years of experience in SharePoint, Microsoft 365, and Power Platform - Specialist in Power Apps (Canvas and Model-Driven), Power Automate, and Power BI with focus on governance, data modeling, and security - Expertise in process automation, custom enterprise solutions, and Microsoft 365 integrations - SharePoint development across SSOM, CSOM, JSOM, REST API, and SharePoint PnP - PowerShell scripting for administration and automation - Delivered end-to-end solutions for clients from small businesses to global enterprises **.NET, Azure Cloud & DevOps** - 10+ years of experience in Azure Cloud architecture, .NET development, and DevOps - Strong background in Azure infrastructure design, Azure AD (Entra ID), and secure deployments - Azure Functions and Azure Logic Apps for serverless and workflow automation - Solution architecture for enterprise automation and cloud deployments - CI/CD pipelines, cloud migrations, and scalable production deployments ⭐Development Frameworks/Technologies: ✅ Front End development - React.js, Angular, Typescript, GraphQL, Asp.Net MVC ✅ Back End development - Asp.NET Core, Asp.NET API ✅ SharePoint 2013/2016/2019, SharePoint Framework (SPFx), Graph API, Office 365 ✅ Modern & Communication Site, MS Team, Branding ✅ Power Apps - Canvas & Model-Driven apps, PowerApps Components Framework ✅ Power Automate (MS Flow), Graph API ✅ DB - MySQL, MSSql, ✅ Cloud Infrastructure - AWS, Azure, Google Cloud ✅ GitHub, Jira, Bitbucket

I help businesses build, modernize, and maintain high-quality web applications using ASP.NET Core, C#, Angular, React, SQL Server, and Azure. With 10+ years of professional experience, I have delivered scalable enterprise applications, REST APIs, eCommerce platforms, and custom business solutions for startups, agencies, and established companies. Whether you need a new application, feature development, API integration, performance optimization, or long-term maintenance, I can help. What I Can Help You With ✅ ASP.NET Core & .NET Development ✅ C# Web Applications ✅ REST API Development & Integration ✅ Angular & React Frontend Development ✅ SQL Server, Entity Framework & Dapper ✅ Azure App Services & Cloud Deployment ✅ Microservices & Background Services ✅ Performance Optimization ✅ Bug Fixing & Troubleshooting ✅ Application Modernization & Legacy Migration eCommerce Expertise In addition to full-stack development, I have extensive experience with nopCommerce, including: * Custom plugin development * Payment gateway integration * Shipping integrations * Theme customization * Multi-store & multi-vendor solutions * Checkout customization * Third-party API integrations * Version upgrades and migrations * Performance optimization * Technologies Backend * ASP.NET Core * ASP.NET MVC * .NET * C# * Web API * Entity Framework * Dapper * LINQ Frontend * Angular * React * JavaScript * TypeScript * HTML5 * CSS3 * Bootstrap Database * SQL Server * Stored Procedures * Query Optimization Cloud & DevOps * Microsoft Azure * Azure App Services * Git * GitHub * CI/CD Why Clients Work With Me ✔ 10+ years of professional experience ✔ Clean, scalable, and maintainable code ✔ Strong communication and reliable delivery ✔ Quick troubleshooting and problem solving ✔ Long-term support and maintenance ✔ Focus on quality, performance, and best practices Whether you need a full-stack developer to build an application from scratch, extend an existing system, integrate APIs, or solve complex .NET issues, I'm ready to help deliver reliable, high-quality solutions. Let's discuss your project and turn your ideas into production-ready software.

I've spent 25+ years building custom production systems, over $500K worth and more than 20 of those in .NET, and these days I'm focused on AI. I build LLM and RAG pipelines, AI agents, and document-intelligence workflows in Python and .NET, usually for businesses whose operations are too unique for off-the-shelf software to fit. The messy, niche, one-off projects most people won't touch are the ones I enjoy most. I automate the manual work that's eating your time and only bring in AI where it genuinely adds value. Hire me when you need something actually built, not just wired together out of existing tools. When the requirements are one of a kind and the domain is a real tangle, I work out the architecture, learn whatever the problem needs, and ship a production system from scratch. That's a big part of why clients stick with me: one for 13 years, another for 4, and a lot of them started with a single project and just kept coming back. "I have yet to give him a hurdle he can't clear." — Scot Nichols, Automotive Diag (2-year client) WHY BUSINESSES CHOOSE ME I don't just build what's on the ticket. I want the actual problem first. Before I write any code I dig into how your business runs: does AI really help here, or would something simpler be more reliable? How will it scale? What will the ongoing model and compute costs look like? Good software, AI or not, has to fit how your business actually works, not whatever's trendy this quarter. I spot the issues you might not see yet — runaway LLM costs, latency under load, multi-user concurrency, awkward integrations — and head them off before they get expensive. I've also helped clients set subscription pricing and cut cloud bills. And I build to last: Clean Architecture, real test coverage, monitoring, and documentation. WHAT SETS ME APART I work across the whole AI and software stack and more than one ecosystem: • AI & LLM engineering — OpenAI, Azure OpenAI, Anthropic/Claude APIs, RAG pipelines (vector + BM25 hybrid, reranking), pgvector, prompt engineering, model selection and benchmarking • AI agents & automation — Microsoft Foundry (Agent Service, Agent Framework), multi-agent orchestration, custom tools via Azure Functions / OpenAPI / Logic Apps / MCP, knowledge-grounded agents over SharePoint / OneLake / Blob, human-in-the-loop approval gates, A2A federation — published into Microsoft Teams and 365 Copilot • Document intelligence — Azure Document Intelligence (prebuilt + custom neural/template models for invoices, receipts, IDs, contracts), Azure AI Search knowledge mining, confidence-scored extraction with human-review routing, PII detection/redaction • Enterprise .NET — ASP.NET Core, Entity Framework, WPF, Clean Architecture • Python data engineering — FastAPI, pandas, Apache Airflow, async processing • Multi-cloud & real-time — Azure, GCP, AWS with Terraform; file monitoring, API integrations, automated workflows When I do use AI, I back it with real numbers, not guesswork — recall@k, MRR, and LLM-as-judge scoring for faithfulness and relevance. For agents that means real guardrails: per-agent identity and RBAC (Microsoft Entra ID), least-privilege tool access, prompt-injection mitigation, approval gates on anything business-critical, and monitoring of citation rates, retrieval accuracy, and token cost. If a plain, non-AI solution is more reliable or cheaper, I'll tell you up front. PORTFOLIO HIGHLIGHTS RAG Pipeline (Security Compliance) — End-to-end RAG over NIST security publications (SP 800-53 Rev 5 + AI RMF). Hybrid retrieval (vector + BM25) with a cross-encoder reranker, measured on a hand-labeled 95-question eval set: recall@5 0.63 → 0.83, MRR 0.48 → 0.64, holding at 10,000-chunk scale. Inline citations, grounded "I don't know", prompt-injection guardrails. Tech: Python, FastAPI, Azure Container Apps, Azure OpenAI, pgvector, Langfuse, CI/CD Automotive Documentation Platform — Multi-tenant system that automated a fully manual Google Sheets process. Syncs PDFs/images from field devices, organizes jobs, generates branded reports, and reconciles with QuickBooks invoices, eliminating missed billing. Built as a multi-tenant Azure SaaS. Tech: ASP.NET Core, Azure, QuickBooks API, OCR / PDF extraction Climate Data Integration Pipeline — One-off platform integrating 120+ government data sources, with scheduling, error handling, and monitoring. No template ETL tool could handle the source variation. Tech: Python, GCP, Apache Airflow, PostGIS Real-Time File Monitoring System — Event-driven Azure platform processing 100,000+ files. Self-healing recovery, parallel processing, sub-second latency. Tech: .NET 9, Azure Cosmos DB, Docker, Azure Functions LET'S TALK Top Rated Plus | 100% Job Success Score | $500K+ Delivered | 10+ Years on Upwork Send me your project details and I'll usually get back within a day, with real questions and a first take on how I'd approach it.

Experienced .net developer and native English speaker. I am eager to help with both new and existing projects. My goal is to provide a service to you that will make your business better. If that means developing the tools you need or consulting on a project, I'm here to help. Benefits of working with me: 1. I'll schedule an introduction call via Zoom to discuss your project before you select me. 2. During the project, I am reachable via phone, e-mail and text messaging. 3. I will provide regular status updates via Zoom or Email. 4. All of my work is tested before I ask you to review it. 5. You will be able to review my work and approve or request revisions. Technical Information: I do both full stack development (everything from the ground up) or can integrate as part of your existing team. My technical focus is on .Net based technologies, including ASP.net, Blazor, Microsoft SQL Server, Azure Cloud Services and SignalR. I also have experience with older technologies such as VB.net, WebForms, and WinForms, as well as rebuilding solutions from other languages and platforms such as PHP or WordPress. I look forward to working with you on your next project!

I help businesses build scalable SaaS platforms, enterprise web applications, APIs, dashboards, and AI-powered tools using .NET, Blazor, React, Python, and Azure. I am a Senior Full-Stack Developer with 10+ years of experience in .NET, Blazor, React, Python, Azure, SQL Server, PostgreSQL, and modern cloud architecture. I have delivered enterprise-grade systems for government, insurance, HR, logistics, and large business operations. My work is focused on clean architecture, performance, security, and long-term maintainability. What I can help you with: -Custom web application development -SaaS platform development -.NET Core / ASP.NET Core APIs -Blazor, React, Angular frontends -AI chatbots, RAG systems, and Python-based automation -Database design, optimization, and reporting -Azure cloud deployment and DevOps -Legacy system improvement and performance tuning -Enterprise dashboards and workflow automation Why clients work with me: -10+ years of real production experience -Strong understanding of business workflows -Clean, scalable, and secure code -Clear communication and regular updates -Ability to work independently or with your team -Available full-time in US EST timezone I have built systems used by thousands of users, processing large volumes of records, supporting payroll, HR, insurance, financial workflows, reporting, integrations, and mission-critical operations. If you need a developer who can understand your business problem, design the right technical solution, and deliver a stable product, I would be happy to help.

With over 𝟰 𝘆𝗲𝗮𝗿𝘀 of experience in ASP.NET, I build 𝗾𝘂𝗮𝗹𝗶𝘁𝘆 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 that 𝘀𝗮𝘃𝗲 you 𝘁𝗶𝗺𝗲 𝗮𝗻𝗱 𝗺𝗼𝗻𝗲𝘆 through solid 𝗲𝘅𝗰𝗲𝗽𝘁𝗶𝗼𝗻 𝗵𝗮𝗻𝗱𝗹𝗶𝗻𝗴, 𝘂𝗻𝗶𝘁 𝘁𝗲𝘀𝘁𝗶𝗻𝗴, and 𝗹𝗼𝗴𝗴𝗶𝗻𝗴. With ASP.NET ensuring 𝘀𝗺𝗼𝗼𝘁𝗵𝗲𝗿 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁, faster debugging, and 𝗿𝗲𝗱𝘂𝗰𝗲𝗱 𝗺𝗮𝗶𝗻𝘁𝗲𝗻𝗮𝗻𝗰𝗲 𝗰𝗼𝘀𝘁𝘀, ultimately saving you 𝘁𝗶𝗺𝗲 𝗮𝗻𝗱 𝗺𝗼𝗻𝗲𝘆. I follow 𝗦𝗢𝗟𝗜𝗗 and 𝗗𝗥𝗬 𝗽𝗿𝗶𝗻𝗰𝗶𝗽𝗹𝗲𝘀, and I design clean architecture that's 𝗺𝗼𝗱𝘂𝗹𝗮𝗿, 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲, and 𝗲𝗮𝘀𝘆 𝘁𝗼 𝗺𝗮𝗶𝗻𝘁𝗮𝗶𝗻. Whether you're looking for help with web application, API development, backend services, ASP.NET Blazor, DotNET Razor Pages, or microservices, I deliver code that’s 𝗿𝗼𝗯𝘂𝘀𝘁, 𝗿𝗲𝘂𝘀𝗮𝗯𝗹𝗲, and future-proof. Technologies I utilize: ☑Back-End Development: ✔️ C# ✔️ ASP.NET Core ✔️ ASP.NET Core MVC ✔️ ASP.NET Core Web Api ✔️ Entity Framework Core ✔️ REST APIs ✔️ JWT Token Authentication ✔️ RBAC ✔️ SignalR ✔️ DotNET Web Applications ☑Front-End Development: ✔️ React ✔️ Angular ✔️ Blazor ✔️ Razor Pages ✔️ DotNET Webforms ✔️ .NET WPF ✔️ TypeScript ✔️ Javascript ✔️ HTML5, CSS3, SCSS, Bootstrap ✔️ C# Console Applications ☑ Databases: ✔️ Microsoft SQL Server ✔️ PostgreSQL ✔️ SQLite ☑ Mobile Development: ✔️ React Native ✔️ .NET MAUI ☑ Third-Party API Integration: ✔️ Google ✔️ AWS ☑ Third-Party Payment Integration: ✔️ Stripe ☑Email Integration: ✔️ Amazon SES ☑Cloud Services: ✔️ Azure ✔️ AWS ✔️ Google Cloud

I’m a senior .NET full-stack developer and architect with over 15+ years of experience building secure, scalable, and high-performing digital platforms. My core expertise is in enterprise CMS and DXP solutions, with deep hands-on experience in Sitecore, Sitefinity, Umbraco and Optimizely. I help companies modernize and scale their digital ecosystems by combining strong architecture, clean engineering practices, and AI-assisted development - always guided by human judgment and production-ready standards. → CMS & DXP Specialization Extensive experience with Sitecore (v8–10+), Sitefinity (v4.1–15+), and Umbraco across MVC, headless, and hybrid architectures. My focus is on performance, maintainability, and long-term scalability. → Architecture & Best Practices Strong background in Sitecore Helix principles, modular design, and reusable components. I design systems that are easy to extend, test, and support as business needs grow. → Headless & Modern Frontend Hands-on experience building headless CMS solutions using React, Next.js, and Vue, integrated via REST and GraphQL APIs for fast, flexible, and AI-ready digital experiences. → Backend, Integrations & Cloud Expert in C#, Dot NET Core, and Web API development, with solid experience in enterprise integrations, Azure environments, CI/CD pipelines, and performance optimization. → AI-Focused, Human-Driven Delivery I use AI tools to accelerate development, improve code quality, and enhance consistency—while ensuring every solution is fully reviewed, secure, and built to enterprise standards. → Certifications & Professional Trust 4x Sitecore Certified Professional 4x Sitefinity Certified Professional Certified ScrumMaster → How I Work I take ownership, communicate clearly, and deliver production-ready solutions with minimal ramp-up. Clients value my ability to quickly understand complex systems and provide reliable, long-term results. I’m currently offering my senior-level expertise at competitive rates and am open to long-term, high-impact projects. If you’re looking for a dependable Sitecore, Umbraco, Sitefinity or Optimizely expert who can architect and scale your platform with confidence, let’s connect.

I’m a full-stack developer with deep expertise in Angular and .NET, specializing in building seamless hybrid applications that bridge desktop and web. From crafting flicker-free UI with Angular route resolvers to architecting robust backend services in .NET Core, I deliver scalable, maintainable solutions with precision. 🔧 I thrive on solving complex activation flows, optimizing IPC mechanisms, and refining MSIX packaging for flawless deployment. Whether it's protocol activation, COM/DCOM interop, or registry cleanup—I've got it covered. 🚀 Let’s build something powerful, elegant, and ready for global scale.

I'm Vijay Singh with 12+ years of experience in Microsoft Technologies and Mobile App Development. An Entrepreneur and a Competitive Player since the beginning, I’ve always been able to transform my passions into business opportunities. I'm a creative and pragmatic forward thinker, driven by the use of technology by people and companies in everyday life. Flexible and enthusiastic about embracing new projects and challenges. Strategic vision and strong 'customer-oriented' approach. Geek mindset, early adopter of new technology. Out-of-the-box thinker, not afraid of stepping out of the comfort zone. Strong communication skills developed over several years and have a great impact on my clients. They say " You are awesome with development especially good with logic and requirement understanding". If you want a team who cares about your Dream Projects then let's connect with me and get world-class quality on the timeline. Always open to the business association. I'm here to give free support and consultancy on your projects (Consultation on the concept of your idea, technology, market survey, etc) to make a long-term relationship with you. Yes! One more thing, Cheap can't be the best, and the best can't be cheap. Our expertise - Expertise is not limited as I keep on growing continuously and provide a helping hand whenever the plate of work is full. So some domains where I am excelling are: 1. Complete Microsoft Solutions a. ASP.NET+ADO/.NET/C# b. HTML/DHTML/JavaScript c. MVC3.0/4.0/5.0/Entity Framework/LINQ d. ASP 3.0 e. Azure/AWS f. XML, Crystal Reports g. AJAX h. SQL Server i. NopCommerce j. Shopify/Telerik/Kentico k. AngularJS/NodeJS/KenoUI/SaaS/Vue.js/ReactJS l. Paypal/payumoney/authorise.net/PayTM/Other Mobile App Development: - iPhone, iPad, and iWatch - Android - Source Controls, Github, BitBucket, SVN, TFS Web Development: - PHP - Shopify - Other So if you are looking for a Top Class developer for your project, do contact me. I will be happy to help you.