The main reason might be that the demand is higher in the US the in the EU but, in addition, both demands have different characteristics. In my opinion most of

The main reason might be that the demand is higher in the US the in the EU but, in addition, both demands have different characteristics. In my opinion most of EU demand for software developers comes from cost centers, i.e. software departments from banks, utilities, public administration, etc. A cost center has less incentives to pay high salaries, because they don't expect benefits to rise because of it. While in the US, Google, Oracle, Facebook, Amazon, to name a few, create a different (and huge) type of demand where paying high salaries pays back.