Casey Muratori's Origin Story | The Standup

Casey Muratori’s path into streaming and long-form software teaching traces back to a single, high-impact demo: Jonathan Blow’s early “compile-time execution” work in Jai. Blow streamed compiler demos on Twitch—most notably a game-like example where compiling would actually play the game and bake results (like enemies killed before death) into the executable. That kind of “do real work at compile time” metaprogramming showcased what the language could do, and it helped normalize the idea that programming could be both expressive and practical.

Muratori credits that moment with nudging him toward trying Twitch himself. People who already knew his background—especially his “Witness Wednesdays” blog about what he was building in the game—started asking when he’d stream. With Blow’s Twitch activity as a visible precedent, Muratori decided to “try something,” which quickly became Handmade Hero: a long-running, engine-building series that walks viewers through the operating system layer, memory, rendering, bitmap loading, and other core mechanics in a hands-on way. Muratori admits he isn’t a natural game designer; his strength is building engines and systems, so the series focused on the foundational “how to make a program do these things” rather than on game design polish.

Handmade Hero’s popularity, Muratori says, wasn’t just entertainment—it filled a gap for programmers who found traditional learning paths too abstract and disconnected. For many viewers, the series offered a first real look at how low-level programming actually works: poking at the OS, understanding memory behavior, and reading file formats directly. He believes that for a certain class of developer, this was the missing on-ramp. The result wasn’t only more viewers building small projects; it was a pipeline of talent. At Better Software Conference, Muratori heard stories from attendees who started with Handmade Hero and then went on to build “absolutely insane” software—examples mentioned include File Pilot, plus later work that surprised him by scale and ambition.

That feedback changed Muratori’s mindset about his own output. After the conference, he considered producing a condensed version of the series—keeping the “straight line” learning path while cutting extraneous material like ray tracing that took many episodes and required extensive experimentation. He also described how Handmade Hero’s impact felt emotionally validating because his motivation has always been to make software “not suck as much.”

The origin story then widens into Muratori’s earlier programming formation: as a kid, he wanted to attend SIGGRAPH but faced an age restriction that barred him from the technical sessions. His father took him to the expo floor and the Film and Video Show instead, where he saw Pixar’s Knickknack short (premiered there) and other graphics research reels. Years later, his first real convention experience—GDC in the mid-to-late 1990s—reinforced the same feeling: being surrounded by people intensely serious about game programming. Muratori contrasts that with today’s more corporate, money-driven conference vibe, saying Better Software Conference briefly restored the earlier sense that programming is exciting again. The takeaway is that Muratori’s teaching career wasn’t accidental; it was catalyzed by a compile-time demo, then amplified by a learning format that made low-level software approachable—and by the community’s proof that it worked.