How to send periodic notifications from node server after checking a postgres database without cron jobs.

Hi, I have a node server that handles checkins and chekouts of its users. Once a user checks in how can I send notifications to the user after every 30 minutes reminding them to checkout. I can't use cron jobs because if the server restarts it might mess up the notifications. Is there any way to implement this without using cron jobs.

Submitted March 19, 2019 at 11:28AM by HoloCroc