"4U" - A web app - an intranet-style app for employees in a company

Hello everyone, We are a startup located in Italy called VAI Globale, and we are looking for a developer who can help us in making a prototype of a social-media-, intranet-style web application for a firm's internal employees. The main function of the App is "to show the right people the right information at the right time". We came up with the idea of keywords (#): each keyword can contain important information that the employees need to know, each employee could write a post about this keywords, like and comment on others' posts, etc. (like a social media). This app could also be used for messaging, for "to-do list", and so on. We tried to illustrate our ideas in a power point file attached below (you can open it in presentation mode and click on different buttons to better understand our ideas). For now, we do NOT need you to create all the functions, just a simple first-draft prototype with a simple interface (for example, like the one in the power point), some demo function like signing up, creating keywords, searching for keywords, messaging, ... We would like to finish the first-draft prototype in around 1 week. After that, we will show our partners the prototype and if they like it, we will continue to work with you to finish it. Looking forward to collaborating with you :)