Look at the bottom of your screen, and you’ll find several navigation icons. Choose the one titled Jobs, and it will lead you to the My Job Ads page.
In the upper right corner of that page, you’ll find a yellow Add a Job button. Click it to create a new job ad. The app will let you list various job details, such as job title, employment type, the exact duration of the engagement, etc. Once you’ve finished editing the job advertisement, go to the bottom of the page and click Save and Post to publish the ad.