Evan Mesterhazy
Software Engineer at Google
New York, New York, United States
Summary
🤩
Rockstar🎓
Top SchoolEvan Mesterhazy is a software engineer with nine years of experience, currently building systems at Google in New York. He combines a strong academic foundation—MS in Computer Science from Columbia—with practical experience across startups, consulting, trading systems, and OS development, bringing both breadth and depth to backend engineering. Evan contributes to open-source tooling, notably improving core functionality and derive-macro support in the Git-compatible jj VCS project, showing a knack for developer tooling and low-level correctness like content hashing. His background includes cross-disciplinary roles from research & development to teaching and internships at security and identity companies, which gives him an eye for rigorous design and clear documentation. Colleagues rely on him for readable, maintainable code and for tackling generative problems that sit at the intersection of systems and developer ergonomics.
9 years of coding experience
3 years of employment as a software developer
Postbaccalaureate Study, Computer Science, Postbaccalaureate Study, Computer Science at Columbia University in the City of New YorkMaster of Science - MS, Computer Science, Master of Science - MS, Computer Science at Columbia EngineeringHawken SchoolBachelor of Science - BS, Bachelor of Science - BS at The Ohio State University
Github Skills (12)
version-control10
rust10
subversion10
cli9
command-line9
command-line-interface9
rust-macros9
proc-macro9
git9
data-structures8
data-structure8
enums7
Programming languages (22)
Github contributions (5)
jj-vcs/jj
Jan 2024 - Jan 2026
A Git-compatible VCS that is both simple and powerful
Role in this project:
Back-end Developer
Back-end DeveloperContributions:257 reviews, 131 PRs, 284 pushes in 2 years
Contributions summary:Evan contributed to the core functionality of the "jj" version control system. Their work focused on improving code readability by adding comments and renaming variables in the command-line interface (CLI) source code. They also implemented the `ContentHash` trait for several data types, ensuring correct hashing behavior. The user further developed a procedural macro to derive the `ContentHash` trait for structs and added support for generics and enums.
emesterhazy/scm-record
May 2024 - Nov 2025
`scm-record` is a UI component to interactively select changes to include in a commit. It's meant to be embedded in source control tooling.
Contributions:40 pushes, 15 branches in 1 year 6 months
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