Unavoidably: US based, 6 figures right from the start. You're pretty much half way there already.
Just happen to live in the US, work and don't be stupid financially. I guess it also helps not having a big "student debt" (that's also not US exclusive but US typical, since in many other countries education is cheaper - subsidized and you don't gradutate with a debt. ATL not a personal debt). But since there's so much tech demand in the US irrespective of education, you can often skip college and follow a different path. But not if you have to immigrate with a student visa to go the H1B way, haha!
The casualness with which you can earn those amounts of money and then lecture (not this particular post, more like the trend) on "retire at 40" or "financial independence in 10 yrs" is a bit tiring (from an outside perspective, and in a harmless-envious way) but all the best to those that are in a position to make it. Yes, casualness in a relative sense, not implying you don't have to work or anything like that.
Congrats to OP.