@jessebot Wow!
“At age 25 I became the first paid programmer working with Richard Stallman at the newly formed Free Software Foundation, where I worked on Project GNU, a completely free (as in speech, not as in beer) replacement for commercial Unix. I wrote the TexInfo documentation system. At age 27 I authored the Bash shell.”
https://lifehacker.com/im-brian-fox-author-of-the-bash-shell-and-this-is-how-1820510600