I'm wondering if you're planning to update JobRoller with a mobile theme or responsive features.
Yes, we are planning to have all of our themes responsive by the end of this year :)
Also I'd like to know if there's an option for visitors to bookmark job listings for later.
When you are logged in as a job seeker, yes you can use the "Star Job" button within the job listing page to add it to your "Starred Jobs" list in your customer dashboard. Thanks.