Kevin Frei
Retired at Retired Life
Seattle, Washington, United States
Summary
👤
Senior🎓
Top SchoolKevin Frei is a retired software engineer and engineering manager based in Seattle with nearly three decades of experience building compilers, runtime code generation, and performance tooling at Microsoft and Meta/Facebook. He led JIT and AOT codegen teams for .NET and contributed to LLVM/Clang work at Facebook, later shifting into mobile and web performance—bringing deep systems-level expertise to high-scale product teams. An active open-source contributor, Kevin has improved developer tools from LLDB debuginfod tests to React state library Recoil and a cross-platform G-code sender, reflecting a rare mix of low-level compiler QA and front-end build/config work. Now enjoying retirement projects that include custom keyboards, FIRST robotics, and Electron tinkering, he still combines hands-on engineering curiosity with seasoned leadership.
10 years of coding experience
20 years of employment as a software developer
The University of Utah
Stackoverflow
406reputation
23kreached
15answers
0questions
Github Skills (33)
debugging10
debug10
javascript10
dwarf10
testing10
user-interface10
graphical-user-interface10
lldb10
java10
human-interface10
cnc10
javas10
gr10
state-management10
react10
Programming languages (7)
Github contributions (5)
llvm/llvm-project
Feb 2019 - Feb 2025
The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.
Role in this project:
QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:85 reviews, 25 PRs, 170 comments in 6 years
Contributions summary:Kevin primarily contributed to testing and improving LLDB's Debuginfod integration. Their work involved creating and modifying tests for split-dwarf scenarios and standard debug information, ensuring correct symbol acquisition from Debuginfod services. The commits demonstrate efforts to address buildbot issues and improve test configurations for various platforms, including Linux and FreeBSD. Several iterations and adjustments were made to the test setup, reflecting a focus on robust and reliable testing.
compilerstechnologiesclangsubmittoolchain
facebookexperimental/Recoil
May 2020 - Oct 2020
Recoil is an experimental state management library for React apps. It provides several capabilities that are difficult to achieve with React alone, while being compatible with the newest features of React.
Role in this project:Front-end Developer
Front-end DeveloperContributions:5 commits in 5 months
Contributions summary:Kevin primarily contributed to the React-based state management library, Recoil. Their work included initial setup and build configurations, particularly modifying dependencies. They also fixed a React dependency issue, ensuring the project passed basic tests. Additionally, the user made updates to type definitions and corrected module imports.
react-appsreactstate-managementreact-hooksredux
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