Cron Hash times

We have several jobs which need to run every 12 hours, but they are rather heavy jobs.
A job easily takes 15+ minutes and consumes both CPU and network, so we definitely don’t want to run them al together at the same time. I have discovered that there would be a feature to use a ‘hashing’ algorithm to create semi-random start times using a ‘H’ iso a ‘*’. But I’m not sure if this is only for Jenkins, or if this also works in Hangfire?

Also, we don’t want the job to run exatcly at 1PM, 2PM, … but randomly at 13:47, and another at 14:03, and so on. Is this also possible?