Justin Horvitz
Software Engineer at Google
Cliffside Park, New Jersey, United States
Summary
🤩
Rockstar🎓
Top SchoolJustin Horvitz is a software engineer with nine years of experience, currently at Google, specializing in back-end systems and performance optimization. He holds a BS in Computer Software Engineering and an MS in Computer Science, blending practical engineering with advanced academic foundations. His open-source work includes impactful contributions to the high-profile Bazel build system, where he reduced memory footprint, refactored core data structures, and hardened incremental build error handling. Justin’s strengths lie in making large, complex systems more efficient and robust—often by finding subtle edge cases and squeezing out resource usage. Based in Cliffside Park, NJ, he brings a disciplined, detail-oriented approach to scalable infrastructure problems.
9 years of coding experience
Master of Science - MS, Computer Science, Master of Science - MS, Computer Science at Drexel UniversityBachelor of Science - BS, Computer Software Engineering, Bachelor of Science - BS, Computer Software Engineering at Johnson & Wales University
Github Skills (9)
memory-optimization10
javas10
build-system10
java10
data-structure9
error-handling9
data-structures9
multithreading8
performance-optimization8
Programming languages (4)
Github contributions (5)
bazelbuild/bazel
Apr 2019 - Dec 2022
a fast, scalable, multi-language and extensible build system
Role in this project:
Back-end Developer
Back-end DeveloperContributions:142 reviews, 431 commits, 7 PRs in 3 years 8 months
Contributions summary:Justin primarily focused on improving the core components of the build system, specifically addressing the memory footprint and performance of actions. Their contributions include code refactoring for enhanced memory efficiency, notably reducing the memory usage of various data structures, such as command-line arguments. The user also improved the error-handling capabilities by addressing edge cases involving the removal of invalidation nodes during incremental builds, ensuring more robust and efficient build processes. Additionally, the user was responsible for ensuring proper implementation of various optimizations throughout the codebase.
scalablecorrectbazelmulti-languagebuild-system
justinhorvitz/MAI
Feb 2017 - May 2017
Contributions:116 pushes, 2 branches in 3 months
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