An ASP.NET MVC w/ Razor developer designs, develops, and maintains web applications using the ASP.NET MVC framework and the Razor view engine. They structure applications using the Model-View-Controller (MVC) pattern to separate data, user interface, and control logic, enhancing code reusability and readability. They utilize Razor syntax to create dynamic web pages with C# or Visual Basic. Their duties also include debugging, testing, and improving application performance, as well as integrating applications with databases or other software systems. They collaborate with other team members to ensure the smooth delivery of high-quality web solutions.