Facebook is a useful platform where recruiters might find their potential employees, because many people post their work experience and special skills in their facebook profiles.
You can add more search filters and corresponding keywords to pinpoint potential candidates. In this example, I add search filters such as location and the corresponding keywords "San Francisco" and "San Jose"; I also add filters such as job title and corresponding keyword "Software Engineer"
When you click search, it will generate a Facebook search result.
You can click into the profile page to see more information. Remember to check Hiretual's Chrome extension and you can add this candidate into your project or send an email to him.