a client system associated with a user includes at least one hardware processor configured to initiate the following operations . a modified login page is received from a proxy hardware system . an asynchronous engine is loaded by a browser system executing on the client system and caused by a routine from the modified login page . a login process with an authentication profiling service is executed , using the asynchronous engine , to retrieve login information for a back - end server . the authentication process with the back - end server is completed using the asynchronous engine . the modified logic page is generated by the proxy hardware system by adding the routine to a login page being sent from the back - end server to the browser .