I know two people that worked at Amazon as software engineers. They worked in very different groups, one very business integration focused, the other one worked

I know two people that worked at Amazon as software engineers. They worked in very different groups, one very business integration focused, the other one worked in the core Amazon site. Both are extremely professional, intelligent, and capable and I would be happy to work with either again. I think you have a better chance at Amazon of developing strong professional skills that are better suited to a larger number of employers, than you would at Google or FB (but I could be wrong.) Keep in mind technical groups within a large organization can be very different from each other so you should use every opportunity to meet/network across groups.