I did two coding interviews with them, among others. They were both somewhat backend focused. Both were pretty difficult. I solved the first, but failed on the second. One involved writing a web server to serve data to a dummy frontend application that they had already written.

Very transparent interview process. Workplace culture and expectations were clearly described and was very easy to understand their high-paced culture. Lot of focus on design / engineering excellence. Got sent a coding assessment after chat.