Sushil K.

Senior .NET Consultant | C# | .NET | ASP.NET Core | Angular | Rest API

I have helped startups and enterprises build new .NET applications, define solution architecture, modernize legacy systems, resolve complex production issues, optimize application and database performance, simplify backend complexities, integrate third-party systems, and become a dependable long-term member of their development teams over 20 years of my experience. If you're looking for someone who can step into an existing .NET application, quickly understand the codebase, identify the real problem, and start delivering without constant guidance, I'd be happy to help. Over the years, I've worked on challenges that go far beyond code writing, code—performance tuning, troubleshooting production issues, designing scalable backend architectures, optimizing SQL queries, refactoring legacy applications, integrating external APIs, resolving concurrency and data consistency issues, improving application stability, and implementing new features without disrupting existing business workflows. I am hands-on developer and enjoy solving the technical challenges. My Core Areas of Expertise:- ------------------------------------ ✔ ASP.NET Core, .NET Framework, .NET 6/7/8, C# ✔ REST APIs, Web APIs, Microservices & Third-party Integrations ✔ Full Stack Development using ASP.NET Core, Angular, Blazor & MVC ✔ Legacy .NET Modernization (ASP.NET, Windows Forms, WPF) ✔ Enterprise & SaaS Application Development ✔ SQL Server, MySQL, Entity Framework Core & NHibernate ✔ Performance Optimization, Database Tuning & Application Troubleshooting ✔ Cloud Deployment with Azure, AWS, Git, Jenkins & CI/CD Pipelines ✔ ABP Framework & ASP.NET Zero I've successfully delivered projects for clients across the USA, Australia, Canada, France, Russia, and India. My recent Upwork engagement lasted over two years with more than $52,000 billed, and I've maintained 5-star ratings across every completed Upwork project. If you're looking for a senior .NET consultant who can quickly become productive, take ownership of your application, and deliver reliable results, I'd be happy to discuss your project.