I actually looked into this. My wife loves Amsterdam and wants to move there.
From the research I did the Euro carriers like their own citizens and get them into programs when they are in their early 20s to train to become pilots. They send a lot to Arizona to be trained at schools they own or are heavily invested in there.
Working for a US carrier and living in Europe definitely will not happen until you have crazy seniority and can land a wide body international route to Germany. And you will probably still be based stateside so you will be commuting international, which is possible, but not easy.
But if you find a way to do it let me know