London is about 'fintech', so Scala is in great demand. SF Bay Area is about 'webscale' so Go is popular, as it established as The Cloud Automation language. An

London is about 'fintech', so Scala is in great demand. SF Bay Area is about 'webscale' so Go is popular, as it established as The Cloud Automation language. And HN crowd is mostly leaning to SF. OTOH you wouldn't find a great demand for Oracle DBA or C# skills in The Valley, and that's not because they are not in great demand somewhere else - maybe even basically everywhere else like C#. Places lean to some niche or other, and vice versa. Apple places its growing hardware teams in Texas despite new campus in The Valley and all that. Why? Because Austin is very much hardware place.