Walter Lee
Software Engineer at Google
Sudbury, Massachusetts, United States
Summary
🤩
Rockstar🎓
Top SchoolWalter Lee is a software engineer with eight years of experience building and refactoring low-level build systems and compiler toolchains, currently at Google in Sudbury, MA. He has deep expertise in Bazel and compiler internals, contributing to high-profile open-source projects like bazelbuild/bazel and clang to improve Objective-C/Swift integration, artifact handling, and target support. His background spans networking and silicon-focused firms (Mellanox, EZchip, Tilera), giving him practical experience across systems, toolchains, and hardware-aware software. He holds advanced degrees in EECS from MIT and is known for methodical, architecture-first refactors that move compile information and dsym generation into more robust compilation contexts—work that quietly improves build correctness and scalability for Apple platforms.
9 years of coding experience
12 years of employment as a software developer
B.S., M.Eng., Electrical Engineering and Computer Science, B.S., M.Eng., Electrical Engineering and Computer Science at Massachusetts Institute of Technology
Github Skills (26)
objective-c10
ios10
c-language10
build-system10
c1110
c1710
starlark10
compiler-compiler10
rtems10
appleii10
cplus10
bazel10
build-automation10
apple110
compiler10
Programming languages (9)
Github contributions (5)
bazelbuild/bazel
Sep 2019 - Jan 2023
a fast, scalable, multi-language and extensible build system
Role in this project:
Back-end Developer
Back-end DeveloperContributions:51 reviews, 179 commits, 98 comments in 3 years 4 months
Contributions summary:Walter contributed to the Bazel build system by adding and modifying Objective-C related features, including the handling of tree artifacts, integrating Objective-C compilation with Swift, and updating the linking process. They focused on improving the build system for iOS, fixing errors related to include scanning with Objective-C, and modifying internal build actions to use CcInfo, indicating a deep understanding of the build process and tooling. These changes involved modifications to the compilation and linking of Objective-C libraries.
build-systembazelcorrectscalablemulti-language
bazelbuild/rules_apple
Apr 2020 - Jan 2023
Bazel rules to build apps for Apple platforms.
Role in this project:Backend Developer
Backend DeveloperContributions:2 reviews, 31 commits, 3 comments in 2 years 9 months
Contributions summary:Walter primarily focused on refactoring and migrating Objective-C compile information within the Bazel build system for Apple platforms. Their contributions involved moving compile information from the `ObjcProvider` to `CcCompilationContext`, and `CppConfiguration`, and adjusting framework imports. This included updates to header handling and dependencies to facilitate the transition, and also a migration of dsym generation from the objc fragment to cpp fragment. The work aligns with an overall effort to improve the internal structure and build processes for Apple-related targets.
bazel-rulesapplebazel
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