Recruiters who work on a contingency basis typically charge a certain % of the candidate’s annual salary, but this fee can often be negotiated. You should negotiate down to 10%. These recruiters can handle a lot of work at once, helping you scale your team quickly without dedicating internal resources to the search. They are particularly useful when you need to fill positions fast or don’t have the time to manage a thorough hiring process yourself.
You'll need a good interview process.
Advice - hire multiple recruiters at once so they work in parallel.
Credit - Daniel Jacker