Babysitter - Full-time / Part-time

Hello, I'm looking for a nanny that can watch my wife and I's (will be) 3-month-old in the mornings and afternoon, somewhere in the ball park of 8:30 a.m. to 4 p.m. She is just a baby so just looking for standard baby care she is breastfed but will be fed using breast milk via bottles while the wife is away at work (four days a week). I work from home in an open office and my job isn't so strict that I can't step away, so I'd be able to help a bit as needed.