Tech Art Hub is an amazing resource for learning cool technical implementations and best development practices.
Topics
Working with Data in Unreal Engine; Data tables, Data Assets, UPROPERTY specifiers and more!
Begin Play - Gameplay Framework Overview
Industrial-grade shader techniques to build efficient and stylized grass
Unreal Materials Technical Overview
The Book of Shaders
Unreal Engine Network Compendium
FlowGraph
UMG Layout Techniques for Unreal Engine