Going to https://greenlight.jobs/ shows that it's invite only. No offense, but it smells like another of those BS landing pages where the product doesn't exist and just overpromises and then drops you on a "Sorry, this doesn't work yet" page.

There's no evidence that the people on the site are real. You'd expect it to have a sign up page for candidates. There's a "See the CVs" button on the employer link, but it's a link that tricks you into creating a job post. Ideally it should hint a little, like what Glassdoor or Quora does.