A method is disclosed for facilitating electronic commerce over a network includes identifying input dependencies for a call request based on information passed with the call request, identifying state dependencies for the call request based on information passed with the call request, parallelizing calls from the call request based on at least one of the identified input dependencies and the identified state dependencies, developing a service execution map by grouping calls in an execution order including parallelized calls, and processing the service execution map by executing grouped calls in the execution order including parallelized calls.