91APP is a service provider to help the retailing build their own APPs, brand, RWD Webs, members. The department I serve is to develop and maintain of the back-end systems, including ERP and SMS systems. Because of the the company's business and product direction so often need to do cross-platform systems interfacing, such as APP (iOS and Android systems). I also need to cooperate with the customer's to provide WebAPIs and system integration. I also often carry out projects with F2E, UI, UX.