It's really exciting that this work is being recognized with a Nobel Prize. The company I'm working with (HealthRhythms - https://healthrhythms.com) is building products for understanding circadian rhythms and other behavioral patterns as they relate to mental health. There is an interesting body of research that suggests that understanding behavioral patterns and rhythms can help diagnose mental health conditions. And conversely, working with patients to correct and regularize their rhythms can be helpful in treatment. Here is a paper by one of our founders related to rhythm-based therapies in bipolar disorder:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3202498/

As a company, we are using data from mobile phones (GPS, accelerometer, etc) to build rhythm profiles based on individuals' sleep, activity, movement, and phone use patterns. These profiles are then used to build personalized treatment programs to help people correct their rhythms. If you are interested in working on any of these, please do drop us a line (jobs@healthrhythms.com). We are looking for iOS developers and backend (Swift/Objective-C) developers (AWS and Python). I also posted in the Who's hiring thread so you can look there for more details