I was interviewed by two Java developers. Interview was in a room for playing ping-ping, which would be OK for a new startup, but looks somewhat strange for a company with more than 300 employees and almost $100M in funding.
There were no technical questions about front-end Web development. The interview was wrapped up when a group of people came into the room to play ping pong.
Several days later I received an email, saying that I am not motivated enough for TransferWise. Since there were no motivation related questions during the interview, it looked as a generic non-constructive excuse to reject me without any useful feedback.