Is the goal here to make money? Engineer #25 will get at most .3% equity. At a billion dollar valuation that's 3 million, which sounds like a lot, but if you see that exit after 5 years, that's more like 600k a year. Senior eng at Fang makes 400k+, and is much more attainable than first 50 at big company. You'll have a much better chance climbing FAANG ladder if you want to make a bunch of money