Applying is one thing, having your partner put in 'a word' could put him in a difficult position professionally. You might also blame him if things didn't go your way. Instead, ask him to help you prepare for an interview with tips about what the company looks for in candidates and how best to present your skills. You may find working on the same team as your OH is too close for comfort as you will inevitably have disagreements either at home/work which could jeopardise the other part of your life.