Zhaohong Lyu
Software Engineer at TikTok
San Jose, California, United States
Summary
👤
Senior🎓
Top SchoolZhaohong Lyu is a software engineer with nine years of experience building high-performance backend systems and data pipelines, currently based in San Jose and working at TikTok. He brings strong C++ and Python chops, plus front-end React exposure, and a track record of improving production systems—most notably maintaining a C++ Universal Screening Engine handling ~2 billion calls/day and boosting cache hit rates via a formula-priming service. He led a hybrid ETL design that moved client usage from C++ engines into AWS S3 and Snowflake, and earlier built a Redfish automation framework that saved engineering time on firmware qualification. An active open-source contributor, he enhanced Apache brpc’s RTMP support by adding FLV writer options and cleaning up critical code paths for audio/video output. Zhaohong pairs rigorous academic training from Penn State and Carnegie Mellon with hands-on research and teaching experience, and he approaches problems as a self-driven learner who stays curious beyond the job description.
9 years of coding experience
5 years of employment as a software developer
Bachelor of Science - BS Computer Science, Bachelor of Science - BS Computer Science at Schreyer Honors College at Penn StateBachelor of Science - BS Mathematics, Bachelor of Science - BS Mathematics at Penn State UniversityMaster of Science - MS Information Networking, Master of Science - MS Information Networking at Carnegie Mellon University
Chinese, English
Github Skills (4)
cprogramming-language10
rpc10
c-language10
rtmp10
Programming languages (9)
Github contributions (5)
apache/brpc
Jul 2021 - Aug 2021
brpc is an Industrial-grade RPC framework using C++ Language, which is often used in high performance system such as Search, Storage, Machine learning, Advertisement, Recommendation etc. "brpc" means "better RPC".
Role in this project:
Back-end Developer
Back-end DeveloperContributions:2 reviews, 5 commits, 2 PRs in 20 days
Contributions summary:Zhaohong primarily contributed to the `brpc` framework, focusing on the Real-Time Messaging Protocol (RTMP) implementation. Their work involved fixing issues related to the copying of character arrays within the code and enhancing the framework by introducing `FlvWriterOptions`. These updates allowed for writing audio/video content specifically and improved the control over the output. The user also refactored existing code and removed unused variables, thus refining and improving the codebase.
rpcadvertisementindustrialrecommendationgrade
v1siuol/abstract_data_type
Feb 2017 - Oct 2020
Toy ADT
Contributions:18 PRs, 13 pushes, 17 branches in 3 years 8 months
toyadt
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