I offer a service for translators seeking jobs. Can I post?

No. The job posting form is for proposing business arrangements of one type: job poster paying posting recipient to perform services. Web portals, those selling databases of translators, etc., or anyone suggested an arrangement whereby the recipient of a posting would be paying the poster, will be regarded as an illicit advertiser. The posting will be removed, associated memberships will be revoked, and you will be banned from future postings.