I ask because we just finished a job round, and it was so annoying posting our job on all the specialist job boards that apply to us. Every single one had a different enough form that I had to spend time working out how it would be displayed, what went where, dealing with the various problems (eg, we offer full time and part time and the number of sites that make you choose one was frustrating.). I would love there to be a standard data file format where I could have written up our job once, then just uploaded the same file/URL to each job site.
That said, well done for starting this and I wish you luck in tackling this problem.