Interviews at Amazon
The Amazon interview starts with a technical phone screen conducted by a team from Amazon. If some interviewers are not convinced after this phone screen, then it is possible that they will ask for another one to clarify the issues.
If you pass the technical phone screen(s), then you will be invited to several face-to-face interviews. A team of interviewers from different areas of the business will individually conduct an interview and evaluate your technical skills (including coding). One of them is also known as the bar raiser guy. Commonly, this guy is the most experienced, and his questions and coding challenges will be harder. They will evaluate you against other candidates as well, and they will decide whether to make an offer or not.
The main focus is on Object-Oriented Programming (OOP) and scalability.
If you don't get any feedback after a week, then you should trigger a friendly follow-up e-mail to Amazon contacts. Most probably, they will...