Namgung Chan
Data Engineer
Seoul Incheon Metropolitan Area South Korea
Summary
🤩
Rockstar🎓
Top SchoolNamgung Chan is a data engineer with eight years of experience building reliable backend systems and data services, currently working at TMAP Mobility in the Seoul–Incheon area. Previously at Kakao Enterprise and other startups, he has combined production engineering with database-focused roles, including an internship at Kakao Corp. He contributes to notable open-source projects such as Apache DataFusion, where he implemented and hardened mathematical and series-generation functions and added unit tests to improve SQL engine correctness. Comfortable across backend development, database administration, and data engineering, he brings a pragmatic focus on correctness and testability to data pipelines. Fluent in Korean and grounded in a computer engineering degree from Incheon National University, he often bridges product needs with low-level fixes that prevent subtle runtime errors.
8 years of coding experience
3 years of employment as a software developer
학사, 컴퓨터공학, 학사, 컴퓨터공학 at 인천대학교
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (8)
fusion10
query-engine10
rust10
arrow-keys10
sql10
arrows10
arrow-js10
big-data9
Programming languages (9)
Github contributions (5)
apache/datafusion
Apr 2024 - Mar 2026
Apache DataFusion SQL Query Engine
Role in this project:
Back-end Developer
Back-end DeveloperContributions:29 reviews, 20 PRs, 50 comments in 1 year 11 months
Contributions summary:Namgung primarily contributed to implementing and fixing mathematical functions within the Apache DataFusion SQL Query Engine. Their work involved debugging and correcting the `signum` function, addressing issues with zero inputs and return types. Furthermore, the user added unit tests to ensure the correctness of the `signum` function and made code formatting adjustments. The user also worked on supporting string types in the `generate_series` function.
sql-queryarrowbig-datadataframedatafusion
getChan/ADV
Jul 2019 - Jan 2020
Contributions:36 commits, 36 pushes, 1 branch in 6 months
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.