I worked with a guy that was intermediate in his mid 30s after around 10 years experience. Conversely there was a 50 year old guy who became a programmer after

I worked with a guy that was intermediate in his mid 30s after around 10 years experience. Conversely there was a 50 year old guy who became a programmer after he moved to my country and couldn't practice as a doctor. He was senior after about 5 years