Nodejs code to run in Iron.io as a worker to perform a task (AWS experience a plus)

I need to have a worker running in [login to view URL] that will trigger when an Item is added to the MQ. The job of the worker is to get the ID of a specific AWS ec2 machine, and then authenticate to aws, and stop/terminate that specific machine. when aws confirms the message we will remove the specific message from the queue. If the The key for the script is to run very very quickly. Seconds and ms matter a lot here. let me know in your bid how you plan to make this as fast as possible.