Pros
LOVING my job at Riot. This may not be true for all Rioters, but for me, my job at Riot was a lifestyle change. Riot not only creates the environment and the culture for you to innovate and come up with crazy ideas, but also empowers and supports you every step of the way. From day 1, I felt like I had every right to go in and voice my concern with any process, and suggest/implement changes to better the company. Seniority and politics don't come into play.
Cons
Things to consider- overtime happens...constantly. Everyone works around the clock, and puts in extra hours. I have never completed all of the tasks that I want to finish in a day, and never felt content heading home after work. The thing about Riot is that we hire a lot of overachievers and workaholics, and right now, we are hiring like crazy. But with all the tasks that need to be done, our team still runs very lean. My day is filled 150% with tasks that need to get done, that I don't get the chance to push the limits. I constantly feel like I have to choose between doing my job, and acting on an amazing idea I have to boost our team. I'd like Riot to be better staffed so I can do what I was hired to do, and improve the team, rather than only taking care of emergent tasks at hand.