Upwork is great

We hire contractors from all over the world to do some simple tasks for us. It provides a flexible workforce that without having the burden of starting with a lot of upfront expenditure. Since we are an AI company we use it for data annotation mainly. We can hire as much talent as we want for as much time as we want, and we don't worry if they are going to be able to get paid or not. Upwork always makes them get paid anywhere in the world.