An IIS . developer works on Microsoft's Internet Information Services version ., a web server application and set of feature extension modules. They are responsible for creating, managing, and optimizing secure and scalable web applications. Their tasks include setting up and configuring IIS servers, managing security settings, troubleshooting issues, and optimizing performance. They work with ASP.NET and other Microsoft technologies, and may also be involved in website design and development. Additionally, they must ensure the server's compatibility with various web standards and protocols, such as HTTP, HTTPS, FTP, and SMTP.