I've interned at Cloudflare back in 2020 and had a great time- would highly recommend!

Can't speak to the locations but the stuff you're interested/experienced in seems extremely likely to overlap with what they do. They do a lot of very deep technical things in all kinds of areas.

my recommendation if you want to talk to someone about it: search github/twitter/linkedin for ppl who work there on stuff you like, and just send them a message and ask for a 20 minute call!

have done it plenty of times, has always been extremely positive