An ASP.NET C# developer designs, modifies, develops, writes and implements software programming applications and components using Microsoft's .NET framework. They specialize in C# to create web applications, often interacting with databases. They're responsible for maintaining and troubleshooting existing applications, and often participate in application testing. They also work on front-end development and interface design. They may be involved in gathering and interpreting user requirements, as well as debugging and problem-solving throughout the development process. Their work is typically part of a larger project team, so communication and collaboration skills are important.