Do you have a passion for working with children and their families, but have a schedule that makes it hard to commit to one role for a year. If so, you may make a great backup caregiver with On Call Nanny. Being a backup caregiver with On Call Nanny means providing supplemental and backup childcare for families in the SFO Bay Area, serving corporate employees, private families, area pre-schools, special events, and hotel guests. At On Call Nanny ...