In the movie, the character Nathan built his search engine, "BlueBook", when he was only 13 and the original code he wrote was so groundbreaking that it inspired a comparison to Mozart. Could someone be so off the charts in terms of IQ that they could write an extremely complex codebase and build a company as a teenager?
Not familiar with this movie but I see no reason why not. Search engines are not that intellectually challenging nor do they need complex code bases - the underlying concepts are quite simple. If you don’t think some 13 year old build one, you simply haven’t been exposed to high intellect 13 year olds. I’m sure half of FANG employees (ok maybe just AG employees..) are training their kids to do this now.
I don't think there's any example of reasonably sophisticated and successful software done by a 13 year old, let alone one which requires lots of servers.