Amazon

Not really much. If you get lucky, you can work on backend stuff that works at huge scalability, which is good experience for going to another company.

But most of the software stitching together most of Amazon is pretty terrible. We don't work backwards from a business/customer use case. We set a hyper-aggressive date, ship a minimal, incomplete product to customers, then you fib metrics to make your chain look better.

Discrimination of protected classes/characteristics is rampant here. I've seen H1B managers prefer engineers of their country of origin and manage out capable engineers with Green Cards or citizenship who refused to not slave away. I've also been discriminated against within this company for having a leg injury.