At the last Belgian Julia meetup there were 2 local companies present (10+ employees) that do all their development in Julia:
<a href="http:&#x2F;&#x2F;www.tangent.works&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.tangent.works&#x2F;</a>
<a href="http:&#x2F;&#x2F;www.dynactionize.com&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.dynactionize.com&#x2F;</a>
I understand Blackrock has been sponsering the debugger work.