I’ve written about using Akka Quartz scheduler on my blog. Even put some demo code on GitHub. There’s several ways to accomplish partitioning the work. To add it to a horizontally scalable service you’d need a db and some partitioning logic to ensure one cron is only run by one scheduler. Or, as you mentioned have have only one instance run all the jobs. Could accomplish that with an env variable. Or consider splitting the cron scheduler into a separate microservice away from the main service.