Both really. The client has a Django project that already had a REST interface for a handful of AJAX calls, and I have python expertise, so they hired me. The

Both really. The client has a Django project that already had a REST interface for a handful of AJAX calls, and I have python expertise, so they hired me. The project is using a Django extension called Piston: https://bitbucket.org/jespern/django-piston/wiki/Home https://bitbucket.org/jespern/django-piston/wiki/Home Which is really quite nice for building REST APIs with Django.