At 12, Latta was part of team that developed an online video game with 10,000 users. At 15, he designed the No. 1 app on the App Store, gaining more than a million downloads. Nothing special he said. Also at 15, he tested out of high school, and with his parentsâ reluctant blessing moved from his home in Los Angeles to San Francisco â alone â to learn more about computer coding. Within 24 hours he had a job, with a higher salary than both of his parents together. Still, he said, itâs nothing special. Now, heâs on a mission to teach students ages 12-18 coding, how to do the kinds of things he did with computers at their age.