Twitter, Etsy rely on Scala as their main tech stack.
You can probably list a large chunk of the big banks. I know quite of few of City of London's big investment banks all continually look for scala developers. In the same breath I would probably list the gambling companies which seems to be on scala bandwagon as well...
In the UK the public sector (GDS) are investing in scala based projects. E.g The HMRC have about 200 scala developers (me included).
You can probably list a large chunk of the big banks. I know quite of few of City of London's big investment banks all continually look for scala developers. In the same breath I would probably list the gambling companies which seems to be on scala bandwagon as well...
In the UK the public sector (GDS) are investing in scala based projects. E.g The HMRC have about 200 scala developers (me included).