Overnight Newborn Care

We are new parents to a sweet baby boy who isn't letting us sleep much at night. I am returning to work soon and having assistance overnight 1-2 nights a week would be a great help. The hours would be 9 p.m. -6 a.m. Our baby boy does sleep, just not in his crib and we stay awake to make sure he's safe. Having help would give us some reassurance he is safe and also give us some rest! Currently this is our main need. However, we would also love someone to care for our son for the occasional date night! We have one cat who mostly keeps to himself.