Backup Nanny For Infant Care In My Home

I am looking for one or more caregivers to be on call for backup when my primary nanny is unable to work. Hours are Fridays 7 a.m. - 5 p.m. and Saturdays 7 a.m. - 6 p.m. (long hours, I work at a hospital). I have a very sweet 4-month-old. No pets, only minimal baby related housekeeping, I mostly just want you take good care of my baby, If we are a good match I will also be looking for occasional babysitting help for evenings here and there. I can't predict how often I'll need help since this is only for when my nanny takes a sick day, so this job is really for someone who is available Fridays and Saturdays for occasional extra work. Must have CPR/first aid training, no smokers, care provided in my home in Albany off of New Scotland.