it's interesting how Amazon is now positioning themselves as a tier 1 employer. They used to be a tier2. AFAIK they also have a brutal pager culture where you're awoken in the middle of the night.
Isn't that the point of a pager system?
Idea being if you're woken up at 4am because of a flaky test or some issue you'll be more inclined to fix it. And if it's a recurring issue, you'll really want to get it sorted or else your life will be hell. It also pushes emphasis on serious testing methodology and the idea that Amazon is a 24/7 business.
It actually makes a fair amount of sense, but it's also brutal and contributes to burnout and attrition. I also think this is starting to change for some teams.