Same way you find a job in any field you are interested in. Find some companies that are using it[1], find their job page, apply.

To pick out a few companies hiring, where I use their services so want them to succeed:

https://www.docker.io/jobs/

http://careers.mozilla.org/en-US/listings/

http://www.cloudflare.com/join-our-team

[1] https://code.google.com/p/go-wiki/wiki/GoUsers (Note that Google isn't on that list. Pretty sure they use it a bit, and are hiring..)