What is a great developer? Are they people who single-handedly deliver memorable products of such scale or in such short times as to be amazing? Are they peopl

What is a great developer? Are they people who single-handedly deliver memorable products of such scale or in such short times as to be amazing? Are they people who raise the level of their team to significantly higher levels? Either way, such people are known by production -> reputation. Once there, some write about the path (bell labs). I am unaware of a coaching analog as in pro sports - for development, one must do the work.