I’d you have offers from Google and Amazon then why are you interviewing at a place like Monzo? They can probably tell you’re both wasting your time so rejected you on that.
You do cool work, btw. Just be careful, Shopify seems to be real layoff happy. I've even had some of your staff engineers hmu on Linkedin for a position and I've been having to say thanks but no thanks.
Edit: to clarify, I didn't actually end up interviewing at Monzo because the recruiter said no pretty much right away on hearing my salary ask.