django real time engine plus chat

I need a real time engine done plus a chat system on top of it. 2 apps) 1) Real time engine (Django Channels Mongo) Message Model Contenttype UUID Data field (JSON) 2) Chat Engine (Postgres) Chatroom Model with UUID and m2m to users Bonus (add a chat box like freelancer's at the bottom of the window that can be called in a short script)