Mangesh K.

I help businesses build and maintain reliable backend systems using .NET, C#, and PostgreSQL/SQL Server — from legacy .NET Framework migrations to modern .NET Core microservices, cloud-hosted on Azure. 16 completed Upwork contracts, 21,000+ billed hours (including long-term US-client engagements), and 100% Job Success — earned by writing clean, maintainable code and communicating clearly, even while running multiple projects independently. What I bring: ✅ End-to-end ownership — API design (REST & gRPC), database schema, deployment, and performance tuning ✅ Event-driven microservices — Azure Service Bus, Azure API Management (gateway), Azure Functions, Azure Container Apps ✅ Real-time/async systems experience (SignalR, RabbitMQ, Redis) ✅ Comfortable across legacy (WebForms, .NET 4.x) and modern stacks (.NET Core, Docker, Kubernetes, Clean Architecture, CQRS) ✅ CI/CD pipelines (Azure DevOps) and Git-based workflows ✅ Third-party API and payment gateway integrations (Twilio, Authorize.NET, PayPal) ✅ Available to overlap with US/European hours Tech Stack: C#, ASP.NET, .NET Core & Web API, MVC, WebForms, ADO.NET, LINQ to SQL, Design Patterns, Dependency Injection SQL Server, PostgreSQL, Entity Framework Core, EF Core, Dapper REST APIs, gRPC, Microservices, CQRS Azure Service Bus, Azure API Management, Azure Functions, Azure Container Apps, Azure DevOps SignalR, RabbitMQ, Redis Docker, Kubernetes, xUnit AngularJS, jQuery, JavaScript, HTML5/CSS, Bootstrap, HTMX Swagger, Postman Twilio, Telerik, Kendo UI I understand business goals before writing code, and work well solo or embedded in a larger team. 📩 Message me — happy to hop on a quick call to discuss your project.