I spent almost 2 years as a tools programmer on the Diablo IV team. I worked on a variety of
features and bugfixes for the game editor, using C#/WPF tooling and the C++ game engine. Usually
the process was to get a feature request, talk with the designers/artists about their workflow
and how the feature will improve it, and then implement that feature into the tool.
I also regularly helped out our artists and designers with the tool when they ran into problems
with it, pointing them in the right direction or fixing reported bugs as necessary.
I'm proud of my work and happy with how much I learned about dealing with large existing
codebases and AAA game teams. I think the game turned out pretty well, personally!