Greeting from BSP(Build Smarter Planet), we have read your requirements, our Team has done many App, web, and POS for restaurant before, we will create the security API let it sync data from the POS, mobile App, web services, back-end, and the POS at the kitchen side, we are expert at inventory FIFO, LIFO, orders management, stock management, users management, manage loyalty customers, smart report,..., we will apply scrum master to manage your project to make sure it public with high quality and follow the schedule, public free bugs, we will help you deploy, maintenance free. I am looking forward to hear from you. Regards, Tan