Webapp development in Node.js

I need someone to create a webapp for a study in node.js and mongodb. The app will test users' abilities to find objects on images from clicks that get sent to a database. It will have two modes, timed and nontimed. I included images of what those modes would generally look like. The doc file has the general workflow for those two modes. Also included a mode for the moderator that defines regions on the image. A general idea map is also included to help guide the general architecture of the site (of course I leave this to the experts). Branding is not necessary. It will allow users to login using their institution information through an API. A separate frontend would also be requested (although not crucial at this time) that displays an image and a multiple choice question on the left. It will track user clicks on the image and answers to questions. Thanks! Alaa