Declan suggested that I have a look at rubyjobs2 to see what maintenance is needed.
The obvious issue is that it's due an upgrade. I would be happy to bring it up to 5.2.3.
Question is: (a) an update to existing code or (b) "$ rails new rubyjobs3", with the old code & gems pulled in. Advantage of (b) are explained in https://stackoverflow.com/questions/39126598/upgrading-rails-3-2-to-rails-5