Filip Jerzy Pizło

I like to design and implement programming languages.

I'm the Director of Programmability and Data Model at Roblox. Previously, I worked at Epic Games (Senior Director of Language Engineering) and Apple (Manager of the JavaScriptCore Team).

Some of my top accomplishments:

• Inventor of Fil-C
• Architect of a lot of JavaScriptCore's optimizations

Cool recent stuff:

• Zef programming language
• Yosh, the AI bash fork

I post a lot as @filpizlo on X.

I usually go by "Phil" when speaking English.