Applied online at the amazon fulfillment website. Started off with a 30 minute phone screen that asked basic questions including a simple math problem. The interviewer told me that I passed the phone screen before it ended. About a week later I was invited to an on site interview. The on site interview started with a production flow problem, not hard if you are generally familiar with algebra. Just draw out a diagram of the problem so that you can fully understand each component. Later the interviewer will change a portion of the problem and you will have to recalculate. After the initial math problem, you will do four separate interviews. After you finish all four, you are free to leave. 8 days later I received an offer.