Seeking developer

I am part of a team of roughly 20 people. We have three tasks that must be completed 7 days/365. I would like a task reminder that notifies the team when the task has not been completed as well as a team email that informs us that the task has been completed. For each of the three tasks, there are three people that are responsible for completing them. The three people for each task will often change on a daily basis. I need it so that if the first person (primary person for that day) misses the task, the team and secondary person gets a reminder. Same for the third person, as well as a end of day team reminder saying no one completed the task. This is the starting point for discussion. Thanks.