Hao Feng
Senior Staff Software Engineer at Google
San Francisco, California, United States
Summary
👤
Senior🎓
Top SchoolHao Feng is a Senior Staff Software Engineer at Google in San Francisco with 11 years of engineering experience and a PhD from the University of Delaware. He has progressed through software engineering to senior staff roles at Google since 2015, combining deep research roots with production-grade system design. Hao contributes to high-impact open-source projects like Google Closure Compiler, where he improved determinism and immutability in core data structures—work that reflects a careful focus on reliability and maintainability. His background spans academia and industry internships (Amazon, Broadcom), giving him a pragmatic approach to complex problems and mentoring. Known for refactoring and architecting backend components, he blends rigorous academic thinking with practical engineering trade-offs. Outside core product work he maintains an active research profile visible on Google Scholar, signaling continued engagement with foundational advances.
11 years of coding experience
13 years of employment as a software developer
Doctor of Philosophy (PhD), Doctor of Philosophy (PhD) at University of DelawareBachelor's degree, Bachelor's degree at Hunan University
English, Chinese
Github Skills (8)
closure10
javas10
google-closure-compiler10
javascript10
java10
optimization10
type-check9
type-checking9
Programming languages (8)
Github contributions (5)
google/closure-compiler
May 2018 - Jan 2020
A JavaScript checker and optimizer.
Role in this project:
Backend Developer
Backend DeveloperContributions:5 commits in 1 year 8 months
Contributions summary:Hao contributed to the optimization and maintenance of the Google Closure Compiler, a JavaScript checker and optimizer. Their work included refactoring code to enhance determinism by changing `HashMap` to `LinkedHashMap` in key classes and ensuring assignments are iterated in a specific order. Additionally, the user deleted deprecated options in the compiler and added a static method for stage1 compilation, suggesting involvement in improving internal structures and code quality. They made VariableMap immutable.
checkerjavascriptoptimizationtypecheckingoptimizer
fenghaolw/rules_sass
Apr 2019 - Aug 2019
Sass rules for Bazel
Contributions:4 PRs, 33 pushes, 2 branches in 3 months
bazel-rulessassbazelrules
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