Hacker News Reader

You render it to PDF and upload that. You don't just send people a latex source file.

The generated pdf is what ats doesn’t like. Don’t know why but I’ve noticed too.

Which ATS do you use that doesn't accept PDFs?

It accepts PDFs. It can't parse LaTeX-generated PDFs. No idea why. And that's not a specific one, it has been most ATSs in my experience.