Sihui Han
Software Engineer at Facebook
Greater Seattle Area United States
Summary
🤩
Rockstar🎓
Top SchoolSihui Han is a seasoned software engineer with nine years of experience specializing in back-end systems and DevOps, currently based in the Greater Seattle Area and working at Facebook since 2018. He has deep practical expertise in networking software, contributing substantial backend and build-system changes to the widely used SONiC project—spanning Redis-backed SAI integrations, ACL refactors, flex counter schema work, and image build automation. Sihui’s contributions show a pragmatic focus on performance and reliability: enabling Redis pipelining, applying fine-grained locking, and hardening tests and timeouts for real-world topologies. He holds a CS master’s from the University of Michigan and a bachelor’s in Information Engineering from Shanghai Jiao Tong University, combining strong academic foundations with production-grade open-source impact. An engineer who moves fluidly between low-level state management and build/configuration tooling, he brings both breadth across infrastructure and depth in network OS internals.
9 years of coding experience
Master’s Degree, Computer Science, Master’s Degree, Computer Science at University of MichiganBachelor's degree, Information Engineering, Bachelor's degree, Information Engineering at Shanghai Jiao Tong University
Github Skills (41)
docker10
c-language10
sonic10
python10
redis10
back-end-development10
acl10
command-line-interface10
configuration-management10
bash10
abstraction10
schema-design10
abstraction-layer10
networking10
dockers10
Programming languages (4)
Github contributions (5)
sonic-net/sonic-mgmt
Jun 2017 - Mar 2020
Configuration management examples for SONiC
Role in this project:
DevOps Engineer
DevOps EngineerContributions:26 commits, 49 PRs, 23 pushes in 2 years 9 months
Contributions summary:Sihui primarily contributed to the configuration management examples for SONiC by adding logging information, implementing new BGP speaker tests, and updating BGP facts parsing. They also enhanced the PFCWD test by adding support for different topologies and Arista fanout testbeds, and added functionalities to set shape rate on fanout switch. The user was also involved in increasing switch connection timeout and prompt waiting timeout.
configuration-managementansibleconfigurationsonic
sonic-net/sonic-swss
Sep 2017 - Aug 2018
SONiC Switch State Service (SwSS)
Role in this project:Back-end Developer
Back-end DeveloperContributions:38 commits, 54 PRs, 21 pushes in 11 months
Contributions summary:Sihui primarily contributed to the `sonic-swss` repository by implementing and refactoring Access Control List (ACL) functionality within the `aclorch` module. Their work includes adding support for matching Traffic Class (TC) in ACL rules, refactoring tasks for creating and removing ACL rules and tables, and fixing issues related to removing ACL tables with associated rules. Furthermore, the user added egress drop functionality by creating egress ACL tables and rules. The changes indicate a focus on enhancing and maintaining the ACL feature set within the SONiC network operating system.
sonicswitch
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