Juan

I’m a .NET Backend Developer focused on building and improving REST APIs, backend services, database-driven applications, and system integrations. I work primarily with C#, ASP.NET Core, Entity Framework Core, SQL Server, REST APIs, JWT authentication, and Git. I also have practical experience with Docker, automated testing, external API integrations, and real-time communication using SignalR. I can help with focused backend tasks such as: • Building or extending ASP.NET Core APIs • Fixing bugs and troubleshooting existing .NET applications • Creating and integrating REST API endpoints • SQL Server and Entity Framework Core development • JWT authentication and authorization • Third-party API integrations • SignalR and real-time integrations • Reviewing and improving existing backend code I’m especially interested in small, clearly defined projects and backend tasks where I can understand the problem, implement a practical solution, test it, and deliver it properly documented. I maintain public projects on GitHub that demonstrate my approach to API development, architecture, testing, Docker, and technical documentation.