Some way to keep the postings brief would be a huge benefit I think. Many are overly long and make for too much information. Less is more. Just the essentials should be listed, with a link to more information if desired. Maybe using a form to fill in the post rather than free-form. Postings should be 4-5 lines long, not 40-50. Filters for location, job type, and skills would be next after getting the brevity handled.