Freelance work is rarely tied to a place to begin with. A project brief that says so reaches self-employed professionals who work remotely, not just those near your office.
A job ad describes an ongoing role; a project brief describes a result with a start and an end. Aim a role description at freelancers and you either get no quotes or incomparable ones, because it stays unclear what a price would even refer to.
So name the deliverable, the time frame and the interfaces to your team. The sharper the scope, the more solid the quotes that come back.
Ongoing work with a single contractor raises the German question of Scheinselbststaendigkeit, that is, whether an arrangement counts as genuine self-employment. The answer depends on how the work is actually arranged and is a matter of social-security law, not of wording in an ad.
Settle it with your tax or legal advisers before posting. For the ad itself it is then enough to describe a real project rather than dressing a permanent role in project language.
Register once, everything after that runs in the dashboard.
Add tasks, hours and pay, and set the work location to remote.
Applications land in your dashboard, where you can reply directly.
Yes. Choose freelance or contract as the employment type when entering the role, and describe the project rather than an ongoing position.
At least a range. Without one you get quotes that cannot be compared, and both sides spend calls on projects that fail on budget.
That is a social-security question that depends on how the work is actually arranged. We cannot answer it for you. Settle it with your advisers before you advertise.
The current terms are on the "post a job ad" page.