You don’t need to integrate your Traffit with Facebook Jobs. Just create a job, and in the last step you can choose Facebook Jobs as a place where you want to post it:
After posting your first job on Facebook Jobs from Traffit you can connect your fanpage with Traffit, so that the jobs will also be visible on your fanpage, in Jobs tab.
When jobs are posted via Traffit integration and matched to your fanpage, that were previously posting jobs directly on Facebook, all jobs that were previously created are then disabled. You can then manage job postings and applications completely via Traffit.