Post when a job is filled
I think it would be interesting to allow both employers and candidates say when jobs are filled. For example, employers can remove their post and indicate how many people were hired (0,1, 2, 3, etc).
This feature is implemented: http://www.operationsacademia.org/confirmed-placements
and now Candidates or even Schools can inform the rest about a “confirmed placement” and improve the efficient of the Job Market a bit!