I think the solutions we have in development will address the issues at hand here and are along the lines of what you suggest, better categorisation of postings essentially. The main thing that's making this a laborious process is trying to get the UX right (the posting process, discoverability for candidates).

The site is largely still in an MVP sort of state and we're trying to start off giving the message of 'being different' by way of our own presence and interactions with people. We release early and often (though it's been a busy couple of weeks since launch so we've not been able to do as much as we'd like) but not all the things on our roadmap are suitable for that. Some things, like this, we see as deserving more time to get right before rolling out.