An interesting thing to note is how big mobile gaming is when compared to PC gaming.
Apple and Google are largely on here because of their 30% platform cut (this chart only tracks gaming revenue). Steam takes the same cut yet has less than half the revenue.
(Note that while Tencent and NetEase are largely mobile publishers, they are not exclusively mobile publishers - League of Legends is owned by Tencent.)
I’m not OP, but generally the term is machine learning engineer. You get a computer science degree with a focus in ML.
The jobs are fairly plentiful as lots of places are looking to hire AI people now.