I was contacted by a recruiter, who walked me through the steps. I first had a phone screen, and then went on site in Mountain View a couple weeks later. I had 2 technical interviews in the morning, followed by a casual lunch and 2 more technical interviews. I then waited a couple weeks for the results, and was told that I did not get that job, but was offered the chance to apply for another role at google. At that point, the process (which had already taken over a month at this point) had started once again at phone interviews. I did not get past these phone screens.