1. A method, comprising: enabling a user to execute an application at a client; displaying a display screen of the application at the client that includes a user interface element capable of receiving data from the user; performing, in an asynchronous manner, a first validation at the client of data received by the user interface element according to a client-side rule; displaying a validation error in the display screen if the data received from the user does not validate according to the client-side rule; enabling the user to interact with the display screen to attempt to save the data if the data received from the user validates according to the client-side rule; transmitting the data from the client to the server if the user interacts with the display screen to attempt to save the data; displaying a validation error in the display screen in response to a failure of the data to validate at the server according to a server-side rule that corresponds to the client-side rule; and persisting the data into a database accessible at the server in response to a success of the data to validate at the server according to the server-side rule.