The closest to Silicon Valley is London, however salaries there are pitiful. By the time Europe has any attempt to actually create an extremely well-paid bleeding-edge tech hub, that tech will be already in consolidation phase... Dream on.
For a fairly experienced developer in London you're looking at £60,000-£100,000 salary, which is $80,000-$135,000. Maybe not quite Silicon Valley but a far cry from pitiful. London is expensive to live, but nowhere near SV as far as I know.