Core: .NET 6/7/8, C# 11+, ASP.NET Core, Blazor. Frameworks: ASP.NET Core MVC, Web API, Minimal APIs, gRPC. ORM: Entity Framework Core, Dapper. Database: SQL Server, PostgreSQL, Azure SQL, Cosmos DB. Authentication: ASP.NET Core Identity, IdentityServer, Azure AD. Frontend: Blazor WebAssembly, Razor Pages. Testing: xUnit, NUnit, Moq, SpecFlow. API: RESTful, GraphQL with HotChocolate. Messaging: RabbitMQ, Azure Service Bus, MassTransit. Caching: Redis, In-Memory Cache. Cloud: Azure (App Service, Functions, AKS, DevOps), AWS. DevOps: Docker, Kubernetes, Azure DevOps, GitHub Actions. Frontend integration with React, Angular, Vue.js.