Honestly my advice would be to leave FAANG and join an early stage startup ... you're much more likely to meet a wider array of people with similar passions and interests and varied skillsets. Even if that startup itself fails you are likely to meet people you could start another company with and if it succeeds it will be an even better place to start a company from when leaving, most exceptional founders love to sup…
Respectfully this is awful advice, as someone who’s worked at FAANG and early stage startups. The idea that working for early stage startups will help you start your own is a myth propagated intentionally by founders/VCs to recruit SWEs with lowball offers. FAANG is actually way better to meet cofounders. At Google you can have lunch with a talented person every day (there’s internal apps to network like this), plus…
As an engineer for an early-stage startup you daily work and value add - shipping things and invest into deep engineering work, would not be very well aligned with networking and relationship building that would be beneficial to start on your own.
Another interesting idea to consider - as a FAANG engineer you would be able to angel invest already (or fairly soon). That would be a productive (quite expensive though) way to meet more people interested in the same things as you do.