Build me a Text Editor App

MEAN STACK PROJECT! Do not bid if you haven't worked on mean stack before. I want someone to make a Single Page AngularJs App with the following features: - Text highlight and comment like google docs ([login to view URL]) - Multiple people typing at the same time ([login to view URL]) - Record version history ([login to view URL]) Please note that people will log in with their FIRSTNAME only. And there will be ONE page that they can edit. You can start with Trumbowyg ([login to view URL]) and edit it.