Part time nanny needed for 17 month old boy

We have 4 kids but the older ones will be in school mostly, so we primarily need someone to look after our 17 month old so my husband and I can work (my husband works from home, I do sometimes). We are based in Clonskeagh (and have dogs). We would need someone from 12pm - 5pm on Mondays and Wednesdays , with some occasional extra days as agreed with the nanny is advance.