Jason Macnak
Senior Software Engineer at Google
Mountain View, California, United States
Summary
🤩
Rockstar🎓
Top SchoolJason Macnak is a Senior Software Engineer in Mountain View with 13 years of systems and VM-focused engineering experience, currently working on GPU virtualization at Google. He has deep low-level expertise in runtimes and compilers, contributing to flagship open-source projects like the Dart SDK and Flutter engine—implementing ARM64 atomic ops, FFI improvements, VM snapshot and threading optimizations, and performance tracing hooks. His background blends research and industry, including internships and research at NVIDIA and Purdue, and a long tenure of productionizing VM and engine changes at Google. Colleagues would note his knack for untangling build and platform issues and for making subtle memory and threading tweaks that yield measurable performance and stability gains.
14 years of coding experience
6 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at Purdue University
Github Skills (28)
c-language10
multithreading10
flutter-apps10
memory-management10
risc-v10
compiler-design10
thread10
hyper-threading10
optimisation10
cplus10
arm10
flutter-game10
threaded10
dart10
cpp10
Programming languages (7)
Github contributions (5)
dart-lang/sdk
Jul 2012 - Jan 2023
The Dart SDK, including the VM, JS and Wasm compilers, analysis, core libraries, and more.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:2967 commits, 3 PRs, 873 pushes in 10 years 8 months
Contributions summary:Jason's contributions focused on the Dart SDK, specifically within the context of the VM and compiler components. They implemented ARM64 atomic memory operations, added new features to the FFI and adjusted various settings. They also worked on fixing build issues related to Debain packages and removed dead code, and performed some memory-related optimizations.
compilerdartjssdkprogramming-language
flutter-team-archive/engine
Jan 2015 - Oct 2022
The Flutter engine
Role in this project:Back-end Developer
Back-end DeveloperContributions:11 reviews, 124 commits, 253 PRs in 7 years 9 months
Contributions summary:Jason primarily worked on the Dart engine, focusing on core engine functionality. Their contributions included integrating timeline events for performance tracing, specifically related to engine initialization. The user also addressed build configurations, especially in relation to AOT snapshots and related VM changes. Furthermore, they adapted the code for refactoring of snapshot APIs in the Dart VM.
flutter-enginec-plus-plus
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