Bhabani S.

I help companies stabilize, modernize, and extend production .NET applications. I am a senior .NET and C# developer with 13 plus years of experience working on existing enterprise codebases in C#, ASP.NET Core, ASP.NET Web API, SQL Server, Azure, Angular, and React. Most of my work is not greenfield. It is the hard part. Legacy .NET Framework apps, slow APIs, fragile integrations, performance bottlenecks, data issues, and new features that need to ship without breaking what already works. I am comfortable with long running projects, messy code, and complex business logic. If you need someone who can step into an existing system and make safe, useful changes, that is the work I do best. What I can help with ASP.NET Core, C#, and .NET backend development REST API development, third party integrations, authentication, and background jobs Legacy modernization from .NET Framework, ASP.NET MVC, and Web API to modern .NET SQL Server schema design, stored procedures, query tuning, and data fixes Azure deployments, Azure DevOps, CI CD, and production support Angular or React front ends integrated with .NET APIs Bug fixing, refactoring, performance tuning, and scaling existing systems When AI is actually useful, I also build AI workflow automation and RAG systems inside existing .NET applications. That includes OpenAI API integrations, document extraction, internal knowledge search, summarization, approval workflows, logging, fallbacks, and human in the loop review. Top Rated on Upwork with 100 percent Job Success, 100K plus earned, and 7900 plus hours worked.