Yujiang Zhong
Software Engineer at Xiaomi
Beijing, China
Summary
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RockstarYujiang Zhong is a backend-focused software engineer with seven years of hands-on experience in data formats and processing, based in Beijing. He is an active open-source contributor to high-profile Apache projects like Iceberg and Parquet, where he’s fixed critical bugs and implemented enhancements around compression, memory management, filtering, and schema handling. His contributions demonstrate a practical attention to performance and robustness—e.g., addressing off-heap memory leaks in Zstandard and adding short-circuit logic to column indexing. Comfortable working on core data infrastructure, he bridges low-level system details with real-world data workflows and production reliability.
7 years of coding experience
Github Skills (18)
spark10
java10
data-filtering10
javas10
orc10
data-processing10
apache-iceberg10
parquet10
ice10
compression10
apache9
compression-algorithm9
schema-changes9
data-storage9
data-structures8
Programming languages (4)
Github contributions (5)
apache/iceberg
Feb 2022 - Jan 2023
Apache Iceberg
Role in this project:
Back-end Developer
Back-end DeveloperContributions:73 reviews, 6 commits, 36 PRs in 10 months
Contributions summary:Yujiang primarily contributed to the Apache Iceberg project by fixing bugs and implementing enhancements related to data formats and data processing functionalities. Their work included addressing compression level configurations for Parquet files, resolving benchmark issues in Spark, and adding compression properties for ORC files. The user also addressed issues in core components regarding identifier fields and schema updates.
apache-icebergapachebig-datadatastreamjava
apache/parquet-java
Sep 2022 - Sep 2022
Apache Parquet Java
Role in this project:Back-end Developer
Back-end DeveloperContributions:11 reviews, 1 commit, 6 PRs in 1 day
Contributions summary:Yujiang contributed to the Apache Parquet Java project by fixing bugs related to memory management and filtering, enhancing the performance and robustness of the library. They addressed issues like freeing off-heap memory in the Zstandard compression codec and corrected a bug affecting `notIn` filter operations with null values. Furthermore, the user optimized the column index filter by adding short-circuit logic and made row range methods public.
avroparquetapachebig-dataapache-parquet
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