WiFi Appliance - provide billing/authentication system in one linux box

WiFi Appliance - provide billing system in one linux box. Overview: it is required to implement an ‘appliance’ (RaspberryPi based - os configuration scripts, software..) meant to operate as Wifi Portal. The following features have to be enforced: - “Hands-on Procedure”: procedure (web-page) through which it is possible to connect the ‘appliance’ (connect via cable or wifi) to the internet and make a wifi network available to users. Further details will follow. - User based session authentication: users can freely connect to the available wifi network. Then an authentication page is shown and users are supposed to enter credentials as to obtain internet access. - User session connectivity limitations: give the administrator the possibility to set individual or group based limitations on the users’ connectivity (eg. time, speed, etc based limitations). - Log engine: it is required to collect users’ connection details into a db (eg. each visited page, device type, etc). - Admin page: an appliance administration page necessary in order to modify basic settings like the net SSID, IP settings, etc. The portal Web app is required to be written in PHP, preferably using a standard framewok (flexible choice). Only functional UI graphics required. Intermediate project milestones (Requirement Finalization - Sotware Design - Development/Programming - Beta Testing - Deployment - Acceptance Testing) are appreciated. Team based project divided into smaller development iterations. System admin/DevOps and PHP Developer. Please specify the role you are applying for.