There are 2 options on how you want your Jobs in the job portal to appear.
To configure, just head to Settings > Marketplace > Engagement Hub > Setup > Job Portal
Look for the Default Settings section.
Option 1: LIST view
This will just show the Job Title, Location and Job type. Candidates will have to click on the Job title to see more details of the job.
Option 2: Summary View
This view will show a short summary of the job.
Don't know where to add the job description of the jobs? Click Here.