How can you make working jobs that other players can do?

I want to make jobs in my Roblox game, but I didn't know how I can make jobs like: pizza delivery, pizza baker and cashier. I can't find any tutorials on YouTube.

You can use the Teams Service and assign players to that team automatically or manually with scripts and etc.

If you need help with scripting and/or making GUIs for this, you can read some tutorials about them here.