[benhurmarcel]

However in Spain you get an engineer for half the before-taxes salary compared to the US. Even if you add 30% it's still a lot cheaper.

Cost isn't the reason.

[jen20]

Depending on where in the US, even half is pushing it in most of Europe. For juniors, probably 20% of the cost of the US is more reasonable - especially in the 'startup land' of the Bay Area for example.