Chungmin Lee
Principal Software Engineer at Microsoft
San Francisco, California, United States
Summary
👤
Senior🎓
Top SchoolChungmin Lee is a Principal Software Engineer based in San Francisco with 15 years of experience specializing in high-performance query processing and big data engines. He has a strong track record at Microsoft and SAP, contributing to Apache Spark, Delta Lake, Parquet, Arrow, and production execution engines like Velox and SAP HANA. Known for writing modern, modular C++ that balances abstraction with raw performance, he focuses on eliminating inefficiencies in software and hardware utilization. Chungmin moves between compiler/optimizer work and runtime integration, making him effective across the whole data stack from SQL planning to vectorized execution. He combines academic rigor from Seoul National University with practical production impact, often tackling hotspots where algorithmic design meets systems engineering. Outside obvious contributions, he brings a mission-driven perspective—applying engineering rigor to reduce waste and even combat global warming through more efficient software.
15 years of coding experience
10 years of employment as a software developer
Bachelor of Science Computer Science and Engineering, Bachelor of Science Computer Science and Engineering at Seoul National University
Korean, English
Github Skills (145)
apache-spark10
python10
toolbox10
databases10
hadoop10
apache-arrow10
parquet10
subsystem10
trino10
architecture10
r10
big-data10
acid10
scale10
sql10
Programming languages (9)
Github contributions (5)
clee704/hyperspace
Mar 2021 - Jan 2022
An open source indexing subsystem that brings index-based query acceleration to Apache Spark™ and big data workloads.
Contributions:3 PRs, 267 pushes, 48 branches in 9 months
queryindexworkloadsaccelerationindexing
clee704/audiodiff
Feb 2013 - Feb 2014
Contributions:80 commits in 1 year
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