A WPF MVVM developer creates applications using the Windows Presentation Foundation (WPF) platform and the Model View ViewModel (MVVM) architectural pattern. In a nutshell, MVVM is a way of structuring code in an application to make it easier to maintain and test. It also enables developers to bind data from the viewmodel—the class that contains the application's logic—to controls in the view, so that changes in the data are automatically reflected in the user interface.