Kuldip M.

Senior full-stack developer (10+ years) who modernizes and extends .NET applications, then builds the Angular/React frontends and AI features on top of them. 🏆 Top Rated | 100% Job Success Score | 12,000+ hours worked on Upwork 🎯 WHERE I HELP MOST • Legacy to modern .NET: upgrading ASP.NET MVC and older .NET applications to ASP.NET Core, preserving business rules and avoiding risky big-bang rewrites. • Full-stack feature development: ASP.NET Core Web API with Angular or React/TypeScript, backed by SQL Server (Entity Framework Core, T-SQL, stored procedures, query tuning). • AI integration: adding OpenAI/LLM APIs and AI agent workflows to existing web applications, built with proper testing and code review. • Production problems: slow API endpoints, database bottlenecks, integration and payment-gateway issues, IIS/Docker/Azure deployment problems. 🧰 TECHNICAL STACK Backend: C#, ASP.NET Core, .NET, ASP.NET MVC, Web API, Entity Framework Core, LINQ Frontend: Angular, React, TypeScript, JavaScript, HTML5, CSS3, Bootstrap, Tailwind CSS Database: Microsoft SQL Server, T-SQL, stored procedures, query optimization API & Security: REST APIs, JWT authentication and authorization, role-based access control, third-party and payment integrations Cloud & DevOps: Microsoft Azure, Docker, IIS, Git, CI/CD AI: OpenAI API, LLM integration, AI agents; daily use of GitHub Copilot, Cursor and Claude Code to speed up analysis, refactoring and debugging 🤝 HOW I WORK • Business first: I start from the problem you are solving, not just the ticket. • Root causes, not workarounds: I investigate why something fails before changing it. • Maintainable code: clean architecture, security, backward compatibility and tests. • Clear communication: short written updates, and I flag risks early. • Flexible collaboration: I can join your existing team, own a feature end to end, or take on a full project from requirements to delivery. 🕐 AVAILABILITY Based in India (IST), with flexibility to overlap with US and European working hours. Available for long-term, full-time engagements. 📩 HOW TO START Send me your tech stack, the problem you are facing, and what a successful outcome looks like. I will reply with a clear plan and next steps. Whether you need a legacy .NET application modernized, an Angular or React frontend built, an API integration fixed, or AI features added to your product, I'm ready to help.