If you feel a great sense of accomplishment from being hired at Amazon, that's fine. If you believe that you are a superior engineer on the basis that you were hired by Amazon (or Google, Facebook, Microsoft, etc.), you are making a very bad assumption. Some current engineers and alumni believe this fallacy because it supports their beliefs about themselves. It's a trap that stifles their growth. It's as if people aren't aware that these companies desperately need engineers.