What Payroll software do you use to pay your part-timers?

Hi Guys,

I'm planning to hire some devs to help me. Instead of using upwork/fiverr, I am planning to hire a part-timer dev and pay him/her using some sort of Escrow type of software or service?

I'm only going to hire few people as most are done by myself, If you can suggest something, that would be really great!