Ask HN: What would you ask target audience to build a recruiting website?

What sucks the most about Linkedin? Why do you still go there? What's your biggest challenge in the recruiting process?

I'd start with general questions about how things work currently. You can then use those for improvement metrics.

For recruiters, I'd consider. How long, from first coming across a candidate to deciding to hire them, did your process take on average? How long from first starting to look to deciding to reach out to the first candidate? How long was your process overall? What aspect cost you the most time, if any? (multiple choice with fill in the blank option) What aspect cost you the most money, if any? (ditto).

For Hiring Managers, I'd want to know if things that would be nice to have but aren't required are included in their job listing requirements. I wouldn't ask that directly though.

For Candidates, ask them what bugs them. Ask them about their best interview experience where they got offered the job, vs their best when they didn't, and then the worst for each. I'd ask them what surprised them about working at a company as compared to their impression interviewing there. I'd ask them what they would consider helpful feedback if they didn't get a job.