.NET Developers are professionals who build applications using the Microsoft .NET platform. They design, develop, and maintain software such as web applications, desktop solutions, APIs, and enterprise systems. Using languages like C# and frameworks such as ASP.NET, they create scalable and secure applications that meet business requirements.

They also work with databases like SQL Server, implement application logic, and integrate front-end and back-end components. In addition, .NET developers focus on debugging, performance optimization, and following best practices to deliver efficient, reliable, and maintainable software solutions.