Thomson Reuters (matthew.g.campbell@thomsonreuters.com), we are looking for GO hackers to build one of the largest instant messaging servers in the financial market, we are supporting multiple protocols including SIP and XMPP. We have started to open source parts with more to come. https://github.com/ThomsonReutersEikon/go-ntlm
Some advice, jobs that only hire people based on what language they know, versus your capability to learn and adapt to new things probably wouldn't be a place you'd actually want to work.