Feeling worried in hiring helper

Hi parents, I am intending to hire a helper to takecare of my 8mo baby. Helper and baby will be at my parents place while my husband and I are away for work. But the problem is I think I might have overthink too much and always feeling worried if helper can be entirely trusted. I’m so so worried that helper will harm baby in any way because my parents can’t be watching the helper closely as they have their own work to attend to at home. Hope parents with experience here can help me out by easing my overthinking