To display the list of job listings, and to display the frontend job submission form you need to add the correct shortcode to a page otherwise they will not show up on your site.
To list your jobs, use
To show your submission form use
To show a dashboard for logged in users to manage jobs, use
For more information, or to view more shortcodes you can view the documentation.
Note: If you are having display issues with any shortcode, such as 'white space' being visible everywhere, edit your page and switch the to html view rather than the visual editor - remove any 'pre' tags wrapping the shortcode.