Lexie Shi
Software Engineer at Walmart Global Tech
United States
Summary
🤩
Rockstar🎓
Top SchoolLexie Shi is a software engineer with six years of experience building reliable backend systems at major tech companies including Amazon, American Express, and currently Walmart Global Tech. She holds an MS in Computer Science from Rutgers and focuses on performance, memory safety, and core infrastructure work. An active open-source contributor, Lexie helped debug and harden the PHP implementation of the widely used gRPC C core—fixing memory leaks, segmentation faults, and adding compression support—demonstrating attention to subtle, low-level bugs that impact production stability. Known for the motto "be good, be fast," she combines pragmatic engineering with a speed-oriented mindset to deliver robust, scalable services.
6 years of coding experience
7 years of employment as a software developer
Master of Science - MS, Computer Science, Master of Science - MS, Computer Science at Rutgers University
Github Skills (11)
c1710
debugging10
debug10
php10
backend10
c1110
grpc10
performance-optimization9
compression9
c-language4
cprogramming-language4
Programming languages (5)
Github contributions (5)
grpc/grpc
Jul 2019 - Jan 2023
The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
Role in this project:
Back-end Developer
Back-end DeveloperContributions:164 reviews, 134 commits, 225 PRs in 3 years 6 months
Contributions summary:Lexie focused on debugging and improving the PHP implementation of gRPC. Their work included fixing a missing addref in the channel constructor and addressing several issues that led to segmentation faults and memory leaks, specifically in channel and call implementations. Further, they contributed to the implementation of compression features and the improvement of the underlying c-core code. These contributions involved changes to core components of the gRPC implementation, showing a focus on backend functionality and optimization.
objective-ccpppythongrpcphp
HannahShiSFB/grpc-ios
Jun 2022 - Mar 2025
gRPC for iOS
Contributions:165 pushes, 47 branches in 2 years 8 months
grpcswiftios
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