Traditional development of mobile application contains server-side and client-side. Developers should spend a lot of resources and time on developing and maintaining the functionality of the server-side. To simplify mobile application development, we present a backend service platform for mobile app development, which offers customer data storage, user management, file upload and download, geographic location query, push notification and other services. Mobile app developers have access to these services using two different ways: RESTful web service or native SDK. Finally, we present a practical case to illustrate the convenient usage of our platform and the improvement this platform bring to mobile app development.