Rich Gwilliam's digital shed
Unity is one of the most popular 3D engines available; it runs on almost anything, it's usable with a wide support base and has a very attractive pricing model for learning indie devs to big-name studios developing games like Cuphead or Fall Guys.
Although, like a lot of developers, I've played with Unity from a games development standpoint and churned out some tutorial dross, my experience with it is more from a DevOps standpoint.
Specifically, I put together a cloud based build server for a Unity agency that moved the rendering operation off-site and freed up their developers' machines to continue development instead of Unity locking up for the duration.
I haven't yet added any employment history using this skill - please check back later.