Not the typical corporation - and that's a good thing!
Pros
Great Company that is doing an awesome job building an infrastructure based on refreshingly simply core values. TransferWise encourages a collaborative environment. They not only embrace contributions from every team member at any level, they expect it. There are both personal and professional growth opportunities at Transferwise. My interview process was the most unconventional interview to date, and the most energizing. The Leadership Team is impressive and very hands-on, including a final interview with one of the founders - a wonderful opportunity, in my opinion.
Cons
Due to the inherent nature of a "start-up" environment, many traditional processes are still evolving. Iterations of training programs are on-going and still have room for improvement. (This could also be considered a "pro" depending on your perspective.)