US Patent 9852220 Distributed workflow management system

A workflow management system having a queue service, a non-relational database, and a workflow engine. The queue service is configured to receive a task from a computing device. The non-relational database is configured to store data. The workflow engine has a workflow definition defining a plurality of operating states for an application. The workflow engine in communication with the queue service and the non-relational database, the workflow engine is configured to receive tasks from the queue service, query the non-relational database, receive query data from the non-relational database, and execute tasks based on task data, process data, and the workflow definition.