Offset Sequencer Help

Hello All, been looking for a way to sequence offset patterns with no luck and was hoping someone here could point me in the right direction. I would like to be able to play multiple patterns (call them Pattern 1, Pattern 2, Pattern 3) each having 16 steps, with a short note on each step, and while playing the 3 patterns be able to independently shift/nudge all of the the notes in any of the 3 patterns forward or backward in real-time. I know of many sequencers that allow shifting/nudging once a group of notes are selected, but this makes switching from pattern to pattern too slow to be used while performing. Does anyone here know of a sequencer that allows this kind of offset sequencing? And if not, would anyone here be willing to create such a sequencer as a for hire endeavor?
Thanks for looking,