Social Network Web Application with deep customizations...

This project is for web application development. I am a US-based buyer with excellent feedback. My client has hired me to make a social networking website with certain requirements. To give a general description this website will be a hybrid of Facebook and LinkedIn. My approach is first to find and purchase a PHP script and have your team make all necessary customizations. YOU MUST SUGGEST A SUITABLE PHP SCRIPT in your proposal. The core features will be like any social networking script with careful consideration to implement 1) a fully-featured job board and careers section, and 2) a fully-featured chat room with public and private chat rooms. Additional features will include an online store, video section, news section, banner ad module, podcast page, portal-style homepage, user profile page, ability to find and add friends, advanced metrics and analytics, option for paid upgrade in relation to jobs/career section and more. The proposed solution must be mobile responsive and based of a PREMIUM and PAID-VERSION of an EXISTING SOCIAL NETWORKING PHP SCRIPT. Any offer to make from scratch will not be considered. We do NOT require that you are the original developer of the chosen script. Any such script may be based on CakePHP, MVC framework, Codeigniter, Symphony, Ruby, Node.js, Angular or other technologies. Our only requirement is that you can deeply customize it. Our timeline is 60 days for the complete web application. We will purchase the script so please omit any such cost from your bid. Milestones will be divided into 4 payments. Please bid accordingly.