Nanny Needed For My Children - Full-time / Part-time

We are looking for a sitter to come once or twice a month, mainly in the evenings, so that we can do a regular date night. For evening jobs, must be OK staying until late (around midnight); our kids are in bed by 7 p.m. so this is mostly house sitting. Occasionally we may need help during the day as well including weekdays so ideally looking for someone flexible.