The main reason the US is a hub for well-paid programmers, is that there is a giant pool of VCs that subsidise growth for companies that can potentially find money all over the world thanks to the way the US still is a cultural hegemon to western liberal nations with strong English language skills. As long as a US based tech company leverages cultural hegemony (in a positive way) and deep VC pockets, they can succeed in Europe and the world.
The biggest tech company failing at using cultural hegemony in a positive way is Tesla. European consumers have largely abandoned Tesla thanks to E.M. He single handedly ruined the company's position of strength by thinking that US news and politics do not reach us. He did not understand the hegemonic aspect (or was too high to care).