Jie Wen
Apache Datafusion PMC Member
Hangzhou City, Zhejiang, China
Summary
🤩
Rockstar🎓
Top SchoolJie Wen is an experienced backend and database engineer with 8 years focused on high-performance analytics and storage systems, currently serving as a PMC member for Apache DataFusion, Doris, and Arrow. He contributes widely to flagship open-source projects—implementing optimizer rules, refining query engines, and hardening storage layers in projects like DataFusion, Doris, Kvrocks, Databend and Arrow-RS. His strengths include query optimization, Rust and C++ systems work, and practical improvements that boost stability and performance (e.g., join/filter optimizations, memory-safe refactors using unique_ptr). Based in Hangzhou, he has industrial experience from ByteDance and Nebula Graph and has driven kernel-level features such as cascades-style optimizer work for Apache Doris. Notably, his contributions balance deep algorithmic insight with careful testing and code-quality improvements, making him a reliable maintainer for complex distributed database codebases.
8 years of coding experience
1 year of employment as a software developer
Bachelor's degree, Electrical, Electronics and Communications Engineering, Bachelor's degree, Electrical, Electronics and Communications Engineering at Huazhong University of Science and Technology
Github Skills (44)
algorithms10
c-language10
back-end-development10
redis10
testing10
rocksdb10
databases10
query-optimization10
distributed-systems10
indexing10
graph-database10
data-structure10
java10
fusion10
apache-arrow10
Programming languages (15)
Github contributions (5)
apache/datafusion
Mar 2022 - Jan 2023
Apache DataFusion SQL Query Engine
Role in this project:
Back-end Developer
Back-end DeveloperContributions:742 reviews, 73 commits, 392 PRs in 10 months
Contributions summary:Jie primarily contributed to the backend functionality of the Apache DataFusion SQL Query Engine, focusing on the query optimization aspect of the project. The user's commits included the implementation of new optimizer rules, such as those for eliminating scalar value filters and improving join operations. They also addressed and fixed bugs in existing optimizer rules, which included filter pushdown, showcasing their ability to understand and refine the project's core logic and improve performance.
querypythonquery-enginedataframerust
apache/doris
Dec 2021 - Jan 2023
Apache Doris is an easy-to-use, high performance and unified analytics database.
Role in this project:Back-end Developer
Back-end DeveloperContributions:889 reviews, 129 commits, 1016 PRs in 1 year 1 month
Contributions summary:Jie primarily contributes to the backend functionality of the Apache Doris database, with commits focused on code refactoring, bug fixes, and performance enhancements. They actively improve code readability by modifying control flow structures and removing unused code. The user's commits showcase their expertise in optimizing database performance, as seen in the adjustments to date/time parsing and the implementation of optimizations for join operations.
dbmsapache-dorisdbtreal-timehudi
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