Unreal Engine 4 (UE4) has built in support for the Vulkan graphics API. Vulkan is a low-overhead, cross-platform 3D graphics library that gives developers more control over the GPU and lower level CPU usage for their Android base mobile projects. In the following document, we will go over how you can enable and use Vulkan in your UE4 Android projects.
Vulkan is currently under heavy development and should be considered a experimental feature at this point in time. If you wish to build and deploy a mobile project using Vulkan, you will need to download and compile UE4 version 4.12 or later from the UE4 Github branch.