The last req I opened I closed around 500 applicants. I opened it Thursday afternoon and closed it Tuesday morning.

Over 40% were totally nonqualified. The job was for a rails engineer. In the current market, I wanted exactly what I asked for: a senior rails eng. But as long as the applicant had shipped a web app in a dynamic language -- node, react, vue, svelte, django, flask, phoenix, whatever the php folks use, etc -- it's not unreasonable to apply. That 40% had never shipped a webapp. Another 10% or more completely ignored the senior: many had < 1 year of experience.

I ended up using AI to filter because even 1 minute per is an entire 9 hour day. Engaging for 3 minutes per application is 3x that. And I can't be in a position where I spend effort while the applicant spent none: I assume the bulk of these were just mass applications.