Academic freelancing scripts

Looking for software developer who has done this work before, PHP script for Academic site should be responsive and error free, the scripts should have the following Separate Admin/ Writer & Client web sites linked up Manage orders : deadlines, payments etc Hire , promote, and fire writers and editors Manage administrators, editors, writers, and clients Seamlessly, links Paypal with Client segment/site. USERS END SHOULD HAVE THESE Can place new orders Pay for orders through Paypal, credit cards Manage their orders through the Manage Orders tab The client is able to view all orders in the system to date in tabular form with details such as order numbers, date created, tracking number, deadlines, status ( available, completed, pending, editing, un-approved, assigned or not], pay for pending orders, delete pending orders, add files to orders, etc Client can contact administrators/editors and writers, request revisions, upload files, raise disputes, approve, and reject the orders Writers End should have these There are three writers’ levels: ” Normal, Silver and Advanced. “ A writer can bid or Claim depending on level’s limitations Can bid for orders or take them directly depending on their writers levels as stated above Can confirm orders once assigned to them, a process that moves them to the “current orders” listing Can upload files on the “ current orders” , a process that changes their status to “ Editing” for review by the administrator or editorial staff If the order is return for revision, the writer reviews its and resubmits Can request for deadline extension on an order Can view their available, bids, current, dispute, revision, editing, completed, approved and rejected orders Can view and monitor their financial information and returns in the “ Financial Overview” tab Can edit their profile settings in the ‘ My Profile’. Details include ‘Personal Details’, Update Password’, ‘ Payment Details’ Keep Track. *Time is live and running to enable me and writer to know when it’s due. *Manage orders, assign, edit, request revisions, approve, reject, adjust deadlines, fines, etc. *Mark orders as paid, revisions, canceled, etc. *Communicate with Writer under each order using inbuilt messaging service *Get notification of file upload, message, order status change. Chat between writer and I using the system. Communication. Post a notification or message to all writers using the messaging board *Communicate with writer under each order or in email Making Payments Payment method, be it Paypal, NOTE: YOU MUST HAVE DONE THE SAME WORK BEFORE AND WILL NEED SAMPLE