Is there a site somewhere that lists where I can find elasticsearch developers / consultants / firms. I'm specifically looking for people / teams with experience building plugins for core query capabilities as well as log stash. The normal Google-ing for topics always skews towards people who know how to use the REST api which is not what i'm looking for. Geographic location is not important and offshore is somewhat preferred.
There are also numerous independent consulting firms who do this sort of work, such as ourselves (Flax) and Open Source Connections in the USA. We have built Elastic plugins in the past - check out http://www.flax.co.uk/blog/2016/01/27/fun-frustration-writing-plugin-elasticsearch-ontology-indexing/ for one of them.