Jeff Muizelaar
Principal Software Engineer at Mozilla
Old Toronto, Ontario, Canada
Summary
🤩
Rockstar🎓
Top SchoolJeff Muizelaar is a Principal Software Engineer with 21 years of experience, currently leading architecture and delivery work at Mozilla from Old Toronto. He brings deep systems and graphics expertise, demonstrated by substantial open-source contributions to projects like apitrace, webrender, and Rust's stdarch where he implemented low-level SIMD intrinsics and GPU rendering improvements. Comfortable across languages and platforms, he has a track record of refactoring and integrating complex subsystems—ranging from font loaders and Core Foundation bindings to Direct3D/DXGI support and Android media power optimizations. Colleagues rely on him for pragmatic, low-level problem solving and for turning intricate API and rendering gaps into robust, maintainable implementations.
21 years of coding experience
15 years of employment as a software developer
BSE Software Engineering, BSE Software Engineering at University of Waterloo
Stackoverflow
594reputation
18kreached
6answers
4questions
Github Skills (79)
ras10
rasterize10
float3210
graphics2d10
testing10
c1110
render10
c1710
type-system10
javas10
code-generation10
floating-point10
emulation10
rasterizer10
develop10
Programming languages (34)
Github contributions (5)
jrmuizel/raqote
Apr 2019 - Jan 2023
Rust 2D graphics library
Role in this project:
Back-end Developer
Back-end DeveloperContributions:347 commits, 64 PRs, 289 pushes in 3 years 9 months
Contributions summary:Jeff contributed to the `raqote` repository, a Rust 2D graphics library, by implementing various features related to rasterization. Their commits included building a test case, adding PNG writing functionality, and addressing translation bugs. They further enhanced the library by incorporating support for quadratic and cubic Beziers. They also began integrating a blitter system, and refactored significant code.
2d-graphicsrustgraphics-library2dgraphics
servo/core-foundation-rs
Oct 2016 - Dec 2021
Rust bindings to Core Foundation and other low level libraries on Mac OS X and iOS
Role in this project:Back-end Developer
Back-end DeveloperContributions:22 reviews, 94 commits, 121 PRs in 5 years 2 months
Contributions summary:Jeff contributed to the Rust bindings for Core Foundation and other low-level macOS and iOS libraries. They added support for various Core Graphics features, including text drawing modes, subpixel positioning, and stroking. The contributions also included exposing CFURL accessor functions, adding support for CFUUID, and implementing methods for CFArray and CFDictionary.
mac-osrustmachfoundationmac
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