Redmond has been a revelation since Hasenhuttl arrived at the club last December, scoring six goals in his last 17 games.
Hasenhuttl said: “He knows exactly what he has to do and his quality on the ball is a big one. We need this because it's always important that you have a guy who can go on dribbling and gives you time to take a breath if you are playing against a big team.
“I always said that I was very critical of him from the beginning and that now we have found a relationship where he knows the only thing I want to do for him is make him better and better. He accepts that he has to work a lot for the team and he does it now in an awesome way.
“I think he is a very important player for the team now and as long as he is positive with himself and has good body language, it will always be a big performance."