Amazon

You will get lots of experience working with technology built with scalability in mind. It instills good working values like Customer Obsession.

Even after you get hired, you are always evaluated against the ever-rising 'bar'. The 'bar' is the average technical and leadership skill of your peers in the company. Basically, if you are deemed to be worse off than 50% of your peers across the company, you are in danger.

It's hard to give general advice here because every group is managed mostly independently. I would say that focusing on the development of your engineers is important, even if they are not sure of what direction they want to go. You lose a lot of good people simply because they are lost at sea without the tools to navigate.