Simple multi-user interface to trigger builds?

Hi, at work we are running some HPC jobs behind a secure environment, sometimes offline (multiple HPCs, different policies).

We investigated using Jenkins and if there was a lite version (no blue ocean, less plugins, hardened or simpler security) we would probably be able to use it... but for now we are launching jobs with cron from one VM, using a service account.

I am looking at Spinnaker as a possible interface for these builds as it supports cron as trigger, but maybe others here have better ideas? Thanks!