[beastcoast]

Amazon is actually better thought of as a collection of independent startups with their own software architectures, roadmaps and P&Ls. There’s commonly used infrastructure but very little is really mandated at the company level.

[zoover2020]

Exactly. I'd say the enforcement is on org/PE (Principal Engineer) level, cascading down to Senior engineers.

Once you're designing something beyond a small app, you'd have to pass PE review anyway.