Do the work to identify a fit, then go there and make
the case for why you fit
It is almost never possible to have that sort of insight into a company until you're already working there and even then it's a challenge.
I could use that time to apply to more companies instead, or to do a leetcode problem and stand a chance at passing an interview. Or just to watch an episode of Bob's Burgers, that would be time better spent lol.
And then presumably you... I don't know, show up outside of the CTO's house one morning? Or something? Email them directly and hope a spam filter doesn't block you? Hire a skywriter? And ask for a job?
The "you just have to network! don't be a sheeple!" folks are always vague on that part.
I have gotten jobs through networking. Most of them! It happens! It's just sort of unrealistic and glib to assume it always is possible.