For example, in the UK, there's little real tech companies and most developer roles are confined to non-tech support roles in other economy sectors (finance, retail etc.).
San Francisco: 170
New York: 96
London: 90
Boston: 38
Berlin: 34
That is debatable and depends largely on a definition. My viewpoint is that a large portion of the companies in the current VC-inspired "tech" world are merely applying tech and not really developing it. For every company like Datastax there's a dozen of companies which are just applying tech solutions (packaged and sold by other companies) to a specific business/consumer problem.
Or, to put it in other terms, if the job offer does not say "Msc/PhD in X preferred" (where X is the job, like distributed systems, deep learning etc.), then it's likely not quite a "real tech" job.
That might or might not be a bad thing. It means you're more likely to be working for a real company, with a real business model, rather than some freak kept above by advertising and VC misallocation.
My experience has been the opposite in terms of difficulty. In most EU countries the market of software engineers who can also speak the native country's language is really small so its way easier to stand out from the crowd. In the US, you have to compete in a 350 million+ population pool plus global candidates who have studied English their whole lives. In any given EU country the candidate pool is a fraction the size and of those the one's who can communicate fluently in the native language is a fraction of that fraction.