Wordpress job listing/project management plugin

I want to ask for some help. We are a translation agency, and I'm looking for a plugin which would help us to hire our translators for specific translations. I listed the needed functions above, I need the closest solution, or a plugin that can be easily modified to do these things.

Only visible for registered users by us – There is no registration form, only we can register translators. Project list – We can list the current jobs with deadline, language pair, word count. Of course we have upload files too. User groups – We can group the users regarding to language pair (english-hungarian, chinese-german, etc.), and role (translator, and translator/proofreader), and the job is only visible to relevant translators. Instant hire – While we are working with tested translators, the first applicant gets the job automatically (captcha), and the project goes under his/her profile. While sometimes we need translator and proofreader too, or more translator for a specific project, we have to define the needed applicant number (with user role). E-mail notification – Every relevant translator/proofreader gets a notification for every listed job, and if it's still open 6 hours later, they get an another one. t. Project management – The job gets under the translator's profile, shared with the proofreader. They'll upload the final files here. We get e-mail notifications for every changes.

I appreciate every idea and comment. Thank you!

via Chebli Mohamed