I just needed an example that shows that it is not because you can write a compiler that it means you would be productive in a team at a FAANG.

I edited the post above to make it more clear, that they are not comparable on the human aspect, perhaps I should have insisted more, to not give the impression.

It was clumsy from my side, just that I found it difficult to find better example of someone who is well-known good programmer, wrote their own compiler too, wrote their own image decoder too, but not productive in a corporate environment.

He did work on Ticketmaster for some years on their own VAX operating system.

Then he had the dissease and could not keep working.