Cheng Xu
Principal System Software Engineer at The Apache Software Foundation
Shanghai, Shanghai, China
Summary
🤩
Rockstar🎓
Top SchoolDi Xu is a Principal Machine Learning Engineer with 11 years of experience building production-grade search, retrieval, and ranking systems, now working on GenAI and RAG at NVIDIA in Mountain View. He has deep research roots from Carnegie Mellon and a track record at Meta and Zendesk of applying learning-to-rank, query expansion, and retrieval models to real-world products including internal search, Instagram Threads relevance, and conversational knowledge retrieval. His work spans from academic contributions in spoken term detection and multimedia IR to engineering robust recommender and social media analysis pipelines. Known for translating IR research into scalable systems, he combines rigorous empirical evaluation with pragmatic software engineering. An under-the-radar strength is his consistent movement between research and product: he taught graduate ML, published academic work, and then shipped “Smart Search” features at scale. He seeks to further advance retrieval and text-mining techniques within GenAI-enabled applications.
11 years of coding experience
11 years of employment as a software developer
Bachelor of Engineering (BE), Computer Software Engineering, Bachelor of Engineering (BE), Computer Software Engineering at Tamkang UniversityMaster's degree, Computer Software Engineering, Master's degree, Computer Software Engineering at Nanjing University
English, Chinese
Github Skills (115)
spark-sql10
apache-spark10
python10
hadoop10
data-management10
apache-arrow10
rapids10
gpu10
parquet10
cpp10
apache-commons10
commons10
r10
big-data10
velox10
Programming languages (9)
Github contributions (5)
winningsix/spark
Aug 2015 - Jun 2021
Contributions:140 pushes, 10 branches in 5 years 11 months
apachebig-datasparkscalaapache-spark
Intel-bigdata/omniscidb
May 2021 - Feb 2022
OmniSciDB (formerly MapD Core)
Contributions:46 reviews, 50 PRs, 40 pushes in 8 months
foundationdbdatabasemapd
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