Greg
Software Engineer at Google
Summary
🤩
RockstarGreg is an experienced software engineer with 11 years focused on back-end systems, currently contributing to Google’s Bazel team where he optimizes build performance and implements complex configuration and platform features. He has hands-on expertise reducing action cache misses, tuning Starlark transitions, and enabling platform-aware Android SDK selection in a widely used, scalable build system. Known for pragmatic problem-solving, he balances performance improvements with robust bug fixes in a high-impact open-source project. A history buff outside of code, he brings a long-view perspective to engineering trade-offs and system evolution.
11 years of coding experience
Github Skills (5)
starlark10
build-system10
java9
javas9
android6
Programming languages (9)
Github contributions (5)
bazelbuild/bazel
Feb 2015 - Jan 2023
a fast, scalable, multi-language and extensible build system
Role in this project:
Back-end Developer
Back-end DeveloperContributions:492 reviews, 620 commits, 93 PRs in 8 years
Contributions summary:Greg primarily contributed to the Bazel build system, working on features related to configuration, compilation, and build event generation. Their work involved improving the performance of the build process, such as reducing action cache misses and optimizing Starlark transitions. They implemented support for new features such as handling various user-defined build flags and supporting platform-based Android SDK selection, and they fixed bugs in the codebase.
build-systembazelcorrectscalablemulti-language
gregestren/gregestren
Jan 2021 - Nov 2025
Contributions:7 pushes, 1 branch in 4 years 10 months
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.