Techniques for integrating a messaging infrastructure with an existing application computing system include integrating an enterprise service bus (ESB) with an existing application computing system, the application computing system including one or more processing modules providing one or more functionalities; receiving, by the integrated ESB, one or more messages from one or more client computing devices communicatively coupled with the application computing system; managing, by the integrated ESB, the application computing system such that the application computing system communicates with the one or more client computing devices; and transferring, by the integrated ESB, the one or more received messages between the application computing system to one or more of the one or more client computing devices by utilizing the one or more processing modules and the one or more functionalities of the application computing system.