Don't join amazon, especially as a first job. The reason being, there is usually a shit ton of political stuff going on which you won't see as a new grad. The general way companies like amazon work, they try to bring in non-jaded people like you who have no clue what the fuck they're walking into.

For example, if your TL or manager doesn't like you and is deliberately setting you up to fail, you might not catch it early enough to be prepared. They won't tell you in the open either. They'll deliberately try to hide it and trick you into thinking that you're safe. Once you're in that position, they'll try to force you to work as much as possible and leaving is more difficult.

If you go the Cambridge route, you're getting domain knowledge which could let you get specialist roles (and likely a better support structure) at better companies. It's a no-brainer really. Amazon is desperate for practically any warm body they can get because no one with options wants to work there. If you're ever at a point in your career where you have to join amazon, it means that you played the game wrong and got blindsided by a layoff or something. (Ditto for all the other shitty amazon-like sweatshop companies, Elon companies, etc. Don't forget this: company reputation matters)