Background Jobs with Rx.NET

As a backend developer you have to implement some kind of periodically running background jobs from time to time. Most widely used tools I see are timers, tasks, semaphores, half dozens of booleans and enums to keep the state. Depending on the complexity of the code, understanding it can be quite adventurous. Alas, almost none of the developers I asked about reactive extensions (Rx.NET) know that they even exist.