Adding front end post options

Basically I am constructing the basis for a recruitment site, and in the case of job posts I want users to be able to ‘watch this job’ or ‘apply for this job

I would, therefore, like to add options to ‘watch job’ and ‘apply for job’ to job posts on the front end.

Once they have selected the given option on the front end they will need to be able to view a list of the job posts that they are watching or have applied for, either in the back end or in a page only visible to logged in users.

If anybody has any ideas, they would be much appreciated.