This week's list of top stories in fintech: Checkout.com raises $1B round at $40B valuation Building a full stack payments company Unlike Stripe they focus on large global merchants Raised $450m at $15b just 12 months ago Has 1,700 employees across 19 countries Will use this money to focus on the US market Fintech Brex confirms $12.3B valuation, snaps up Meta exec to serve as its head of product Raised $300m at $12.3b valuation Last April it raised $425m at $7.4b Revenue has more than do...