I was contacted by a recruiter about a hiring event. I had talked to Amazon before so I only had to pass a test on hackerrank.com After I passed the test, I was granted an on-site interview. They set you up for 3 interviews and if they "need more data" they ask you to do a 4th interview. The first interview was crazy difficult (it was clearly the bar raiser) I was able to answer the question but made a few coding mistakes. I would give myself a C, the next two were not really difficult if you prepared, I would give myself a B+. I was then told I would need to interview a fourth time. The fourth interview was all technical and comprised of 2 technical questions. I like to believe that my answers were close to perfection and finished under time. I was shocked when I learned that they would not make me an offer.