Andy Weir built a two-decade career as a software engineer until the success of his first published novel, The Martian, allowed him to live out his dream of writing full-time. He is a lifelong space nerd and a devoted hobbyist of such subjects as relativistic physics, orbital mechanics, and the history of manned spaceflight. He also mixes a mean cocktail. He lives in California.
Weir began writing science fiction in his twenties and published work on his website for years. He authored a humor webcomic, Casey and Andy, featuring fictionalized "mad scientist" versions of himself and his friends (such as writer Jennifer Brozek) from 2001 to 2008. He also briefly worked on another comic, Cheshire Crossing (bridging Alice in Wonderland, Peter Pan, The Wizard of Oz, and Mary Poppins) from 2006 to 2008.
The attention these gained him has been attributed to later helping launch his writing career following his failure to publish his first novel attempt, Theft of Pride. His first work to gain significant attention was "The Egg," a 2009 short story that has been adapted into a number of YouTube videos, a one-act play and is the overarching concept of Everybody, the third album by American rapper Logic.