Justin Zhang
Software Developer at DRW
Chicago, Illinois, United States
Summary
🤩
Rockstar🎓
Top SchoolJustin Zhang is a software developer based in Chicago with four years of hands-on experience in low-level systems programming using C, C++, and Rust. He holds a B.S. in Computer Science with minors in Data Science and Physics from UVA and has practical experience applying performance engineering to a major open-source TLS implementation (aws/s2n-tls), adding benchmarks, flamegraph profiling, and memory analysis. At AWS he delivered a comprehensive TLS benchmarking suite ahead of schedule, and he now develops production software at DRW. His research background in TinyML and familiarity with hardware tooling like Verilog and OpenLane reflect a cross-layer curiosity from silicon to software. Justin pairs strong quantitative training with teaching and tutoring experience, often improving learners’ grades by a letter or more. Colleagues describe him as a fast learner who turns performance data into actionable optimizations.
4 years of coding experience
1 year of employment as a software developer
Bachelor's of Science, Computer Science, Bachelor's of Science, Computer Science at University of Virginia
Github Skills (11)
performance-tuning10
mtls10
benchmarking10
benchmark10
rust10
tls1210
tls1310
cryptography10
libtls10
rust-language9
openssl9
Programming languages (6)
Github contributions (5)
aws/s2n-tls
Jun 2023 - Aug 2023
An implementation of the TLS/SSL protocols
Role in this project:
Performance Engineer
Performance EngineerContributions:159 reviews, 29 PRs, 15 pushes in 2 months
Contributions summary:Justin's contributions center around benchmarking and performance analysis within the s2n-tls project. They implemented and added benchmarks for handshake performance across different cryptographic configurations and signature algorithms. Additionally, they integrated flamegraph generation for detailed performance profiling and added throughput benchmarks. Moreover, the user introduced memory usage benchmarking using Valgrind/Massif.
cryptographysslc99tlscrypto
tinzh/s2n-tls
Jun 2023 - Aug 2023
An implementation of the TLS/SSL protocols
Contributions:5 PRs, 213 pushes, 57 branches in 2 months
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