Henry Qin
Staff Software Engineer at Square
Bellevue, Washington, United States
Summary
🤩
Rockstar🎓
Top SchoolHenry Qin is a Staff Software Engineer based in Bellevue, Washington with 13 years of experience building reliable, high-performance systems across companies from Microsoft and Google internships to a current senior role at Square. He combines deep systems and backend expertise—evidenced by substantive contributions to the high-profile Envoy proxy around gRPC handling—with practical full-stack work on tools like Vimwiki that improve developer UX. A PhD-trained engineer from Stanford with a BA from Duke, Henry moves fluidly between research-quality thinking and shipping production fixes that improve stability and maintainability. He has led engineering teams briefly as Head of Engineering and consistently mentors through complex infrastructure and protocol-level challenges. Outside of work he emphasizes continuous learning and good health, an outlook that shows up in steady, focused contributions to open-source and product codebases.
13 years of coding experience
2 years of employment as a software developer
Bachelor of Arts (B.A.), Computer Science, Bachelor of Arts (B.A.), Computer Science at Duke UniversityDoctor of Philosophy - PhD, Computer Science, Doctor of Philosophy - PhD, Computer Science at Stanford University
Stackoverflow
73,217reputation
6.9mreached
1,250answers
528questions
git
top-1%
java
top-1%
awk
top-5%
regex
top-5%
makefile
top-5%
r
top-5%
Github Skills (40)
markdown10
git10
reverse-proxy10
wikipedia10
vimscript10
http10
vim-plugin10
java10
vim10
go10
markdown-it10
filter10
grpc10
r9
awk9
Programming languages (14)
Github contributions (5)
vimwiki/vimwiki
Feb 2019 - Apr 2019
Personal Wiki for Vim
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:13 commits, 39 PRs, 27 pushes in 1 month
Contributions summary:Henry primarily contributed to the Vimwiki plugin's core functionality and user interface. They implemented features such as allowing header levels to take counts and adding a command to jump to the next unfinished task. They also addressed bugs related to table formatting and HTML generation, enhancing the user experience and improving code maintainability. These changes involved modifying Vimscript code.
vimvim-pluginvimwikipersonal-wikiwiki
envoyproxy/envoy
Jan 2022 - Jan 2022
Cloud-native high-performance edge/middle/service proxy
Role in this project:Back-end Developer
Back-end DeveloperContributions:29 reviews, 1 commit, 15 PRs in 1 day
Contributions summary:Henry focused on improving the functionality and stability of the `envoy` proxy. Their contributions included addressing issues with gRPC-JSON transcoding and improving the `grpc_http1_reverse_bridge` filter, ensuring correct handling of empty responses. They also removed obsolete code related to a runtime feature. These changes involved modifying core components of the proxy, impacting how it handles gRPC communication and filter logic.
nanoservicesmore-catsgolangcontainersproxy
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