Hongjian Wang
Staff Software Engineer (ML Generalist) at Meta
San Francisco, California, United States
Summary
👤
Senior🎓
Top SchoolHongjian Wang is a Staff Software Engineer and ML generalist with 12 years of experience building production ads systems, currently driving Ads Quality at Meta after leading core ads ML initiatives at Twitter/X. He holds a PhD in Data Mining and Machine Learning from Penn State and brings deep expertise in product ranking, cold-start learning-period solutions, and end-to-end delivery optimization for performance advertising. At Twitter he architected the first Dynamic Product Ads and owned Learning Period Revenue, blending rigorous research instincts with pragmatic, high-throughput engineering. Based in San Francisco, he favors data-driven iteration across cross-functional teams and has a concise GitHub handle "lambda" hinting at a fondness for elegant, functional approaches. Colleagues know him as a "hardcore engineer" who survives high-pressure ad-quality challenges while shipping measurable ROI improvements.
12 years of coding experience
6 years of employment as a software developer
Middel SchoolPh.D. Data Mining; Machine Learning, Ph.D. Data Mining; Machine Learning at Penn State UniversityBachelor's degree Computer Science, Bachelor's degree Computer Science at Shanghai Jiao Tong University
Stackoverflow
75reputation
25kreached
6answers
2questions
Github Skills (20)
multiprocessing6
2d6
multicore6
intellisense6
multithreading6
dataframe6
java6
git6
jvm6
vscode5
vscode-extension5
python5
visual-studio-code4
visual-studio4
pylint3
Programming languages (3)
Github contributions (5)
thekingofkings/embedding
Dec 2016 - Aug 2018
Contributions:104 commits, 92 pushes, 1 branch in 1 year 8 months
thekingofkings/chicago-crime
Aug 2015 - Aug 2018
Contributions:294 commits, 133 pushes, 2 branches in 3 years
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