Can you please take a look at https://www.theoris.com/open-jobs/
I have no idea why it is getting horrible page speed. It is scored like 27/100 on the desktop version. All other pages load well.
Google gives me this info: PSI estimates this page requires 5 render-blocking round trips and ~42 resources (3.5MB) to load. The median page requires 4 render-blocking round trips and ~89 resources (1.3MB) to load. Fewer round trips and bytes results in faster pages.