These are all classic scheduling problems and there are many solutions for all of them. The least complicated might be to learn how to use a constraint solver a

These are all classic scheduling problems and there are many solutions for all of them. The least complicated might be to learn how to use a constraint solver and input your constraints directly into it. Often that is overkill because if you have less than 10 jobs and 10 workers computing the schedule that minimizes latency (critical path) is easy to do by hand. However, as you surely know, modelling developers as schedulable jobs doesn't work in practice.