[danijelb]

> It is also true that a single job ad might be aiming to employ a number of people at various positions of seniority and experience.

Separate it into multiple job ads, with well defined requirements and salary ranges.

The role of the interview in that case is to simply determine if the candidate fits the desired requirements or not.

If a candidate applies to the position that doesn't fit their skills this will come up during the interview and the recruiter can tell the candidate that they are better suited for another position and inform them that the interview will continue as if they applied for the lower/higher position.

The company obviously knows how much they want to pay a candidate with certain skills and experience. So by making more detailed job descriptions there is no problem with posting salary ranges. Or if for some reason a company really insists on having one job ad for multiple positions of varying experience then they can put a salary range table where they state salary range for each possible position that a candidate might end up in after a successful interview process.