A scalable computing system for generating notifications for each account of a plurality of accounts, and method of operating thereof, are provided. The system involves: a database for storing: an action definition defining operations executable to determine at least one parameter of one or more actions, and a processor operable to: instantiate an independent management process for the action definition, wherein each management process is configured to: monitor a state of each operation defined in the action definition; identify a worker process associated with the management process to perform each operation based on the state of the operation; and assign the identified worker process to perform the respective operation; and upon detecting a predefined condition in each independent management process, transmit, via a network to a remote node, the one or more notifications for the respective independent management process.