Hasnain Lakhani
Member Of Technical Staff at Anthropic
California, United States
Summary
👤
Senior🎓
Top SchoolHasnain Lakhani is a seasoned software engineer and manager with 13 years of experience building security, developer tooling, and large-scale infrastructure across research and industry. Based in California, he has led teams from 1→7, driven multi-year fuzzing and taint-analysis programs at Meta, and shipped company-wide security and migration improvements at Databricks, including TLS1.3 adoption and internal authorization frameworks. A hands-on technologist now on Anthropic’s Developer Acceleration team, he blends people-first leadership with deep systems expertise—optimizing runtime performance, build systems, and developer workflows. His open-source contributions to high-profile C++ projects like Facebook’s proxygen and HHVM show a focus on build reliability, UBSAN fixes, fuzzing integration, and memory/performance optimizations. Colleagues rely on him to untangle ambiguous problems, mentor engineers, and turn security research into production-ready tools that engineers actually use.
13 years of coding experience
15 years of employment as a software developer
BS Computer Science, BS Computer Science at Lahore University of Management Sciences
Github Skills (15)
hacking10
php10
c-language10
cmake10
cprogramming-language10
regex10
hhvm10
build-automation10
bytecode9
http8
spdy8
data-structure7
data-structures7
algorithm7
algorithms7
Programming languages (12)
Github contributions (5)
facebook/proxygen
Apr 2018 - Jun 2020
A collection of C++ HTTP libraries including an easy to use HTTP server.
Role in this project:
Backend Developer & Automation Engineer
Backend Developer & Automation EngineerContributions:10 commits in 2 years 2 months
Contributions summary:Hasnain primarily contributed to bug fixes and build process improvements within the proxygen repository. They addressed UBSAN warnings, indicating a focus on code quality and error prevention in C++ HTTP libraries. Their work also included adding a CMake option for static dependency fetching, and setting up build configurations for fuzzing, demonstrating an understanding of build systems and testing. This indicates experience with the build process and ensuring code reliability and stability.
http-serverc-plus-pluscppuse-http
facebook/hhvm
Jan 2022 - Mar 2022
A virtual machine for executing programs written in Hack.
Role in this project:Back-end Developer
Back-end DeveloperContributions:47 commits in 1 month
Contributions summary:Hasnain contributed to optimizing the HHVM runtime, focusing on performance improvements within the taint analysis system. They optimized regex handling by implementing re2 and introducing a two-layer cache for sources and sinks. The user also refactored the `Path` data structure to avoid memory allocations and copying, further improving performance. Additionally, they made various improvements and fixes to taint analysis, including implementing several opcodes and handling edge cases in object property access.
hacklangphpvirtual-machineprogramshhvm
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