1. A method of remotely modifying a user interface of an application deployed on a plurality of computing devices, the method to be performed at a server that is remote from the computing devices, the method comprising: defining a plurality of development roles, each development role having at least one user identity associated therewith; associating at least one user interface element of the user interface with each development role of the plurality of development roles such that the at least one user interface element of the deployed application associated with each development role is modifiable by the at least one user identity associated with that development role; receiving parameters for updating at least one particular user interface element of the application from a user identity associated with one of the development roles, each particular user interface element being identified at the server by a programming language unit for the user interface element in the program code of the application; and for each of the particular user interface elements associated with the one development role, sending the received parameters for updating that particular user interface element to at least some of the computing devices, wherein each computing device in the at least some of the computing devices: updates the particular user interface element of the deployed application with the parameters; and displays a modified user interface for the deployed application, the modified user interface comprising the updated user interface element.