Since he called and asked if he could work for you, I think his intentions seem to reflect he doesn't want to cause problems and is hoping to use both of you - asking for a job and place tp stay. He either has a huge ego or he's really dumb to think that you/wife would want contact after he abused your wife before. Is his behavior unpredictable? Is your wife afraid he might show up unannounced? Maybe get an unlisted phone number and consider a restraining order if necessary. Reassure your wife as much as possible. I hope he gets the hint and stays away.