In the first company, these were one-off import jobs that would import customer information from a URL they provided.
In the other, these are long-running daemons for a multi-tenant service, and I need to reduce the risk that one customer could exploit the system and disrupt the other customers or gain access to their data.
I have some other experiments in play right now in which I am packaging up various services as docker containers, but this is currently non-production.