I applied in-person. The process took 5 weeks. I interviewed at Riot Games (Ciudad de Mexico) in Jan 2017
Interview
The process was extensive, international and very in-depth. I went through 5 interviews with various leads both in person and through Skype. Ultimately I didn't get the job but I can respect their desire to maintain their cultural integrity.
Interview questions [1]
Question 1
Everything from technical expertise to specific scenario questions. They are very through.