Got an email inviting me to apply. Applied online. First round interview involved debugging and logic/reasoning test. The bugs were pretty elementary - i.e. index out of range. Second round interview involved more coding. It started with a simulation of a day in the life at Amazon where you had to respond to emails and help prioritize tasks. Next were a bunch of coding questions. Had a live proctor watching me through my videocam which was kind of weird. Final round, I flew out to Seattle and took part in a group interview. The only part we did as a group was analyzing time-complexity of some code and then the rest of the day we spent working on our own. We all worked on our coding in the same room, though. Throughout the day, we were called into interviews with current employees and asked about our code process and what we were going to do next, or what we could have done to make it better. There were a few other what-if scenarios where you tell them what part of your code you would enhance/change to make it work with the new constraints. They said that we would find out if we received an offer within two business days. However, I did not hear for about two weeks.