In Polymer, you can easily make profile updates to any candidate you have access to. Users with the Member role can only access & edit candidates to jobs they are assigned to as part of the hiring team. Admins can access & edit candidates across all jobs.
You can edit a candidate from within their candidate profile by selecting "Edit candidate" from the three-dot, overflow action menu.
After selecting "Edit candidate", you'll be presented with a form that shows all the editable data fields for that candidate.
After you have made your necessary changes to the profile, click the "Update candidate" button to save your updates.