[ornornor]

I too have worked with people like that. The marketing and PHBs love them because all they see is that they deliver 10x faster than the rest of the team (who, therefore, must be subpar and not very competent).

What they never realize is that when things break (and they will, when there are no unit tests, copy pasted code in several place, and inscrutable architecture that no one but the one who wrote it understands), it takes the rest of us 10 times as long to poorly fix/implement the new requirement.

Given enough time, the original 10x engineer moves on or quits, and all he’ll breaks lose because the department or company is left with a giant pile of turd that breaks whenever you look at it.