C#, PHP, C++, .NET (5/6/7/8), .NET Core, .NET Framework, ASP.NET (MVC, Web API, Web Forms, Razor Pages, SignalR, Blazor), ASP.NET Core (Identity, CORS, Middleware, Data Protection), Node.js, Express, Windows Forms, WPF (Windows Presentation Foundation), RESTful APIs, gRPC, GraphQL, WCF (Windows Communication Foundation), Kafka, RabbitMQ, ADO.NET, Entity Framework, Entity Framework Core, JavaScript, TypeScript, Angular (2+ through 16), React, RxJS, HTML5, CSS3, Sass, LESS, Bootstrap, Foundation, Materialize, TailwindCSS, MaterialUI, ChakraUI, REST APIs, AJAX, WebSockets, Microsoft Azure (App Services, AKS, Functions, SQL Database, DevOps), AWS (EC2, Lambda, ECS, S3, RDS), Docker, Kubernetes, Azure DevOps, GitHub Actions, GitLab CI/CD, Azure Resource Manager (ARM) Templates, CloudFormation (basic), Azure Monitor, AWS CloudWatch, SQL Server, MySQL, PostgreSQL, MongoDB, Cassandra, Cosmos DB, DynamoDB, NUnit, MSTest, Mocha, Jest, Cypress, Selenium (basic), CI Test Pipelines via Azure DevOps, Singleton, Factory, Repository, Dependency Injection, Microservices, Layered Architecture, MVVM, MVC, Asynchronous programming, caching strategies, connection pooling, ASP.NET Identity, OAuth2, JWT, HTTPS, CORS, OWASP Top 10, Data Protection API, CSRF/XSS prevention, HIPAA (Healthcare apps), PCI-DSS (Payments), Agile, Scrum, Kanban, TDD, CI/CD, Code Reviews, Peer Programming, Jira, Azure Boards, Confluence, Git, GitHub, GitLab, TFS (Team Foundation Server), Code reviews, branching strategies, pull request workflows, Visual Studio, VS Code, Rider, Postman, Swagger, Fiddler, Notepad++, Windows 8/10/11, macOS