Abstract: The subject system may be implemented by a processor circuit configured to receive, from a user device, a request to initialize an event-driven product, initialize, responsive to the request, a product state data structure for the event-driven product, receive a plurality of events corresponding to the event-driven product, each respective event of the plurality of events comprising a respective state change and a respective effective time; store each respective state change in the product state data structure in association with the corresponding respective effective time, process the respective state changes in the product state data structure based at least in part on the respective effective times to determine a current state of the event-driven product, receive a request for the current state of the event-driven product, and provide, in response to the request, the current state of the event-driven product.