A task transformation architecture meets the technical challenges of geographically distributed task assignment and completion, e.g., by crowd-sourced workers who are external to any given enterprise that needs the task completed. The architecture delivers task information to the workers while maintaining confidentiality. In one aspect, the architecture determines when task descriptions include confidential information, transforms the task to remove the confidential information, and delivers the transformed task to the worker. When the worker responds with a completed project, e.g., source code for executing the transformed task, the architecture transforms the completed project into a form that restores the confidential information.