Apple - lots of evidence it's a toxic work environment, highly secretive. Maybe not an instant veto, but skeptical.
Deliveroo - Gig economy gets a veto from me.
Uber - ditto, if anything, even worse.
Spotify - Would have once upon a time, but these days they seem pretty awful, and their front-end tech is sorely lacking, to say the least.
Amazon - intensely and notoriously abusive to employees at all levels.
Netflix - high-pressure work environment not for me, some disturbing practices.
Palantir - state-sponsored spying, no thanks. Lives up to its name.
Google - mostly an adtech business at this point. Skeptical.
Meta - I'd rather be homeless than help Meta do anything for anyone.
The places above, I'd be reluctant or outright unwilling to ever even bother applying to. That leaves Babylon, Cloudflare, Monzo (where the OP was hired), TrueLayer, Instabase, Microsoft, Shopify, Wise, Revolut and JP Morgan as orgs I didn't immediately veto or view with high suspicion, and I still view the several related to finance as inherently pretty suspicious.
I can't be the only person out there with a robust "will not work for" list. Fortunately, there's no shortage of tech companies. How do people filter out companies when considering who to apply to?