Marketing automation for end-users

Hey all,

Has anyone ever worked on a project such as Hubspot, or Lemlist, or Customer.io etc. where the platform provides marketing automaton functionality to end users. E.g. you can send sequenced emails as predetermined times, trigger email campaigns based off events and so on.

I’m wondering ‘how’ this is typically handled, and if it would simply use something like the new NodeJS scheduler, or if for scalability it would typically use something else?

Starting to look into this as something we’ll explore in the next 1 to 2 months.