A lot of people in the tech community are into “quantified self” and will use things like fitness trackers, sleep trackers, logging diet and exercise, etc. but that’s more general well being than work performance. Performance in a software engineering role is famously difficult to quantify. Even the relatively obvious stuff like story points throughout reflects on estimates as least as much as on efforts. At elite levels you’re dealing with stuff like presence, influence and mentorship; your “coach” on that kind of stuff is your manager.