Yes, you can! By default, the Jobify theme does not charge users to post Jobs or Resumes. Only if you install the WC Paid Listings plugin, can you accept payments to make job postings. When the plugin is not installed users can post Jobs or Resumes on your site for free. You can also create a free packages and paid packages using the Paid Listings plugin.
Tip: You can also limit what fields are displayed on the submission page when using the WP Job Manager Field Editor plugin, you can limit what fields are displayed per the type of package selected.