Three rounds. First round by two M1 by skype. Second round by two M2 in person, and third round by M3 director. My first interview happened on Wednesday and the last two happened just two days later on the same day. It's very fast. By the way, 30 mis logic test before the first interview. It's like A can't meet on Mon, B can't go to C's house blabla, and in the end where and when they meet.