Cashier and deli girl at the local grocery store, 16
Unofficially = washing cars at a Honda car lot, ten hours per week for about two months in the summer, 15 years old.
Officially = Baskin-Robbins, ice cream scooper (back in the days when you had to wear a pastel PINK shirt and hat), 16.
I was a babysitter since the age of 10 and even had my own Babysitter’s Club at age 12. When that got old, I became Denny’s Worst Waitress at the age of 17, a distinction I held onto for a grand total of one month and two weeks.