Hi. Very nice solution. I learned a lot from you in this case. I like your concept to fetch all data on the begining. I refactored my solution after yours.
I had problem with useEffect on home page after "go back" from job details page. My fetch data was accumulating becouse [...state ...data]. I moved useEffect to parent Component - in my case MainTemplate component. Home Component after mounting don't fetch any data now. I'm writing about it becouse i saw the same problem in your solution. Your JobProvider wrap only Home component so after unmount-mount component you restart all your data. Maybe this is what you want - i don't know.
In App.js I saw something like Routes from react-router-dom. Can you tell me what is it?
I also study a lot about React. I like your solution. It's very clean. I learned from you how to use my own hooks. I based my solution on redux and thunk. Keep it up.
P