Evaluating a Software Tester with a hiring process is not easy. A very experienced candidate with a resume apparently fulfilling your needs might be a very bad team member. Unlike a newbie with the right mindset, the will and a true passion who will become an asset to the project and the team.
What should you do to avoid the former and not miss the latter? The question is interesting, and no single answer exists but I suggest you a series of articles to help thinking about this and find the proper tactic.