Cups Print Server Accounting

Looking for C/C++ embedded developper for the following project: Embedded application witch connect a linux based apparatus (raspberry pi) to a server via custom API and send/receive the necessary informations. Health check functionality. Include MQTT protocol ([login to view URL]) The software should be interfaced to CUPS printing server and do the total accounting of print/scan/copy and fax jobs made by printer devices or other connected devices connected to the apparatus. Setup will be made via a secure web server: - Merchants can connect to see the accounting - Technical staff to setup the printers The software should also have a User interface (QT) displayed in a 7" touch screen enabling users to choose between different options (to be discussed). The application should be coded in a portable way. Full documentation and source code for the project must be provided. Maybe there’s something that could be discussed or added. The bidder must have experience on C/C++ embedded coding , keep time line and HAVE TO SHOW US PROFF OF CONCEPT PROJECTS.