Which back-end for Ionic Push?

I’m very excited to use the new ionic.io service Ionic Push and it seems the implementation is really straightforward. My only concern is what back-end solution I should use to take advantage of Ionic’s webhook. Searching the web, I found node-pushserver as one of the few solutions to receive tokens and send pushs.

What back-end solution are you using or what can you recommend (maybe @mhartington)? Thanks for your help!