Qian Sun
Staff Software Engineer at YouTube
Mountain View, California, United States
Summary
🤩
Rockstar🎓
Top SchoolQian Sun is a Senior Staff Software Engineer in Mountain View with 12 years of experience building large-scale backend systems at Google and YouTube. He combines strong research roots—a PhD focus in machine learning—with practical engineering, progressing from internships and academia into senior IC roles at YouTube. Qian has contributed to high-profile open-source cloud-native projects like Istio, implementing core proxy features and a Redis-based quota adapter that improved API management and quota semantics. He specializes in low-latency, distributed systems and service mesh integrations, with a track record of shipping robust core components and refactoring shared functionality. Colleagues rely on him for solving tricky streaming and gRPC issues that sit at the intersection of networking, performance, and platform reliability.
12 years of coding experience
11 years of employment as a software developer
Doctor of Philosophy - PhD, Machine Learning, Doctor of Philosophy - PhD, Machine Learning at Arizona State UniversityBachelor of Science (BS), Electrical Engineering and Automation, Bachelor of Science (BS), Electrical Engineering and Automation at Nanjing University of Aeronautics and Astronautics
English, Chinese
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (17)
env10
service-mesh10
api-management10
envoyproxy10
back-end-development10
redis10
proxy10
go10
convoy10
grpc10
c-language9
microservices-application9
cprogramming-language9
microservices9
kubernetes-pods8
Programming languages (2)
Github contributions (5)
istio/proxy
Dec 2016 - Apr 2017
The Istio proxy components.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:28 commits, 46 PRs, 22 pushes in 3 months
Contributions summary:Qian focused on adding and modifying core components of the Istio proxy, specifically related to API management and interaction with the Mixer component. They implemented an Envoy prototype, integrated GRPC requests, and addressed issues related to streaming requests and latency reporting. The user also added the interface for Mixer and integrated it into the API manager, demonstrating their involvement in core proxy functionalities.
sidecarproxylyft-envoydiscoveryistio
istio/istio
Mar 2017 - Apr 2017
Connect, secure, control, and observe services.
Role in this project:Back-end Developer
Back-end DeveloperContributions:10 commits in 1 month
Contributions summary:Qian primarily contributed to the `redisquota` adapter within the Istio project, which manages quotas using Redis. Their work involved adding, modifying, and testing features related to the Redis quota adapter. This included implementing quota allocation and release functionalities, integrating with Redis, and adding expiration for keys. They also refactored code to extract common functionalities.
circuit-breakerenforce-policiesistioapi-managementmicroservice
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