It’s mostly just because salaries are very high in the US due to the huge amount of money flowing into startups via VCs to accelerate growth. That growth comes from hiring a lot of devs, increasing demand. And few of those startups will accept juniors or folks fresh out of school, because they don’t have the resources to train them. That limits supply.

And on top of that, you have the American tech giants with huge sums of money competing in that same market. And many of these tech companies were founded by engineers and have a very engineering-first perspective, increasing the importance of treating developers well at some level.

So at the end of the day, you get a market with lots of opportunities, fewer experienced devs interested in those opportunities, and lots of money earmarked for attracting those devs.

It’s pretty unique, and I don’t think this scenario really exists in Europe.