In the beginning, I was phone-screened by hiring manager. After one week, I was interviewed with the group of the engineering and asked technical question, and introduction of myself. The third time, I was interviewed by director of the group. All of them were nice and didn't ask trick question, but very detailed in technical questions.

very good, challenging. the interviewers seemed very skilled and professional, and the questions were not so common. when asked a question I recognized they tweaked it nicely and had me think more on what I already knew. I had 2 interviews in 3 days, which is nice and efficient, handled directly with the engineers and managers. met with 4 different persons. the chemistry between them seemed very good.