Gave looking for a babysitter or nanny - babysitting job in Toronto

Im a single dad with a busy professional life. My son is in pre-school during the week. I am looking for a part-time nanny to do daycare pickups at 4pm on Wednesdays, Thursdays, and Fridays. Regular schedule will be 4pm to 7pm. Ill need hours extended to 11pm typically once a week on Wednesday or Thursday.Need flexibility to occasionally be available during the day on Wed, Thurs, and Friday if son is sick and unable to go to daycare.