Amazon

Very knowledgeable and hard-working coworkers, some of the most intelligent people I’ve worked with. You can learn a lot about how to build good software systems. This is a great experience that can be applied effectively in other companies.

Aggressive deadlines, a top-down culture. It used to be very hard to get promoted internally, and suddenly market forces changed and made it very easy to get promoted. Managers are not very transparent, have too much power, and can be biased. There is no corrective mechanism. Teammates can be very opinionated, hard to work with, and toxic, just because the culture encourages the behavior to get promoted.