Open, done and due dates

A job is Open or Done. Mark it done from the job page when the work is finished. Money can still be owed on a done job.
The Jobs list filters by Open, Done or All. Open jobs sort by Due date, soonest first, with a chip showing the date. There are no reminders off the due date, it is a sort key.
A job is not a schedule. No start and end dates, no assignees, no timesheets.