Interesting! I'm honestly pretty unfamiliar with C#, but I'd love to check it out and I'll definitely look into SignalR :)
I think one thing that's been really nice about Elixir is how helpful the community has been, and what an approachable language it is for someone like me coming from a Node/Ruby background (and dabbling in some Clojure :P). It's been really easy to get up and running, and also is just a fun language to work with.
So far finding developers to work in this stack has not been an issue, and we're hoping doing a project like this will attract even more developers to Elixir :)