Facebook has pages and groups. Here you can find current job vacancies in Iraq.
You can see current job vacancies on the Facebook wall. There are pages with regional vacancies in Baghdad and Basra, for example.
You can join a group. You can post details of what kind of job you are looking for on the Facebook wall. Or you can respond to a job offer by commenting on a post.
The Facebook post will have the information you need to apply. You can use Facebook for free, but you will need to create an account.