ZipRecruiter job posting only works in the US, Canada, and UK. 

To post your job to ZipRecruiter, click on Edit Job on the job card

Go to Promote section of the Job
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Check on the ZipRecruiter icon.

Next, make sure under the settings the job status is set "External". External jobs will be visible on your careers page and can be published on various job boards.

Your job will be posted on ZipRecruiter within 24-48 hours.