Doom has seemingly been ported to every electronic device imaginable, including picture frames, lamps, and coffee machines. The meme of “it runs Doom” has become so widespread that it spawned the r/itrunsdoom sub-Reddit.

Recently, Doom made headlines again for being ported to TypeScript. The project involved representing Doom entirely in TypeScript, three and a half trillion lines of types, 90 GB of RAM to run, and a full year to complete.

Dimitri Mitropoulos is the engineer who carried out this heroic feat. He’s also a developer at Vercel, the founder of Michigan Typescript, and a co-founder of SquiggleConf. Dimitri joins the podcast with Josh Goldberg to talk about what it took to pull off one of the most mind-bending TypeScript projects to date.

Josh Goldberg is an independent full time open source developer in the TypeScript ecosystem. He works on projects that help developers write better TypeScript more easily, most notably on typescript-eslint: the tooling that enables ESLint and Prettier to run on TypeScript code. Josh regularly contributes to open source projects in the ecosystem such as ESLint and TypeScript. Josh is a Microsoft MVP for developer technologies and the author of the acclaimed Learning TypeScript (O’Reilly), a cherished resource for any developer seeking to learn TypeScript without any prior experience outside of JavaScript. Josh regularly presents talks and workshops at bootcamps, conferences, and meetups to share knowledge on TypeScript, static analysis, open source, and general frontend and web development.

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