Francis Du
Software Engineer at Google Developers Group
Beijing, China
Summary
🤩
RockstarFrancis Du is a software engineer based in Beijing with eight years of experience building backend systems and data-focused tooling. He currently develops at DiDi and contributes to Apache DataFusion, where he enhanced the DataFrame API, added result display utilities, join support for floating-point and timestamp columns, and caching—work that improves query ergonomics and performance in a notable open-source SQL engine. As a long-time GDG Beijing co-organizer, he blends hands-on engineering with community leadership, regularly connecting peers around cloud, AI, and data technologies. His background across traffic-tech, industrial AI, and big data vendors gives him practical depth in production data pipelines and performance-sensitive systems.
8 years of coding experience
2 years of employment as a software developer
Chinese, English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (9)
dataframes10
query-engine10
rust10
sql10
dataframe10
arrow-js9
arrow-keys9
arrows9
big-data8
Programming languages (12)
Github contributions (5)
apache/datafusion
Aug 2021 - Dec 2022
Apache DataFusion SQL Query Engine
Role in this project:
Backend Developer
Backend DeveloperContributions:12 reviews, 6 commits, 6 PRs in 1 year 4 months
Contributions summary:Francis primarily contributed to the Apache DataFusion SQL Query Engine, focusing on implementing and enhancing the DataFrame API. They added functionality for displaying results with `show` and `show_limit` functions, which required modifications to the `dataframe.rs` and `execution/dataframe_impl.rs` files. Additionally, the user added support for joins on Float32 and Float64 columns, as well as timestamp columns, by modifying `hash_join.rs` and related test files. They also added caching functionality to the DataFrame.
querypythonquery-enginedataframerust
Qihoo360/Quicksql
Jan 2019 - Sep 2022
A Flexible, Fast, Federated(3F) SQL Analysis Middleware for Multiple Data Sources
Contributions:27 PRs, 8 pushes, 1 branch in 3 years 9 months
flexiblesourcesflinksqldata-sources
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