We are going to develop some mobile app for one of our clients, and we are defining the technical solution for the backend server.
Basically, we need to implement a backend providing REST apis for the apps. The apps will need features such as user authentication, handling of user profiles and user contents. The backend should also expose a web administration interface and allow to manipulate some of the app contents in a CMS-like way.
My client specifically wants to avoid baas solution (like Parse), and I am trying to find some open source software able to provide some of the features out of the box, to avoid writing everything from scratch, and develop the other parts. We can use cloud services such as AWS for hosting the backend.
What existing platform/software would you advise?