JETRT is a software framework particularly suited for implementation of both real-time control and data acquisition systems. It is especially designed to work in a complex experimental environment such as the JET nuclear fusion facility. This new architecture maximizes the software reusability. The project-specific algorithm is compiled into a separate software component, in order to achieve a separation from the plant interface code. JETRT provides a set of tools to perform most of the validation phase on a Windows running desktop PC. Thanks to these design choices, both the development costs and the commissioning time have been reduced and even non-specialist programmers can easily contribute to the deployment of a new real-time system.