This talk gives an in-depth presentation of the Qt Wayland Compositor API, showing you how to create a custom Wayland compositor. We will start from scratch and create our own user interface with animations, bells and whistles. As the complexity and requirements of user interfaces grow, it becomes natural to split the UI into several processes. Doing so can improve stability, security, and enable 3rd party application development. Qt has made the decision to use Wayland for this purpose. With Qt Wayland Compositor you can write your own Wayland compositor, making it possible to create custom user interfaces for multi-process embedded applications.