I went through one phone interview and then was invited to an on-site interview. Phone interview had some question to do with regex and basic methods. On-site consisted of 4-45 minute interviews back to back.

First Screening call, then initial interview with an engineer (1 hour) and then final interview with four 1 hour rounds back to back with different engineers. For each round its the same, you'll be asked one behavioral question and one coding (LC style) question.