Application responsiveness is a quality of service consideration. If neglected for a longer period, it can deteriorate to a point where user’s dissatisfaction becomes critical. This may require unplanned, substantial and demanding efforts for responsiveness optimization. The purpose of this thesis is to describe such a case of a three layer application responsiveness optimization. Initially the thesis presents the application’s architecture, used developmental technologies and application’s environment. It explains the approach that was used to address end users dissatisfaction, details the activities for responsiveness optimization and the importance of responsiveness monitoring. Furthermore it describes the activities for prevention of occasional events of extremely bad application responsiveness.