The gradual integration of the REST API into core had been pointing the way to integrations with non-PHP scripting languages for some time, but it was the surprise release of Calypso at the tail end of the year that really made it clear which way the wind is blowing.
If you’ve ever made use of jQuery, Bower, Modernizr, or Yoeman (to name just a few), you’ve already benefited from some of his work. If you haven’t yet checked out either his excellent blog or regular conference presentations, now is a great time to start.
Getting to grips with the wider ecosystem of a language involves much more than simply boning up on syntax and tooling – you really need to start investigating the contributions of leading members of the community to get a more rounded picture.
While this article offers a great place to begin, the people we’ve chosen are obviously just a tiny subset of the community and a starting point for further exploration. We also confidently expect that a similar list this time next year would include substantially more names from the world of WordPress itself.