Abstract: A computer-implemented method and a computer system are disclosed for generating and executing a software appliance comprising the steps of receiving a work request comprising metadata which indicates processing conditions for a computer processing task to be performed; determining a determined processing environment, depending on the metadata included in the work request; selecting one or more software container templates, depending on the metadata included in the work request; generating the software appliance for the determined processing environment, using the one or more selected software container templates; and deploying the software appliance for executing the software appliance on a processing computer system of the determined processing environment.