Leonard Xu
Apache Fluss Committer at The Apache Software Foundation
Hangzhou City, Zhejiang, China
Summary
🤩
Rockstar🎓
Top SchoolLeonard Xu is a seasoned distributed systems engineer with 10 years of experience, currently leading Flink CDC and connector efforts at Alibaba Cloud and serving as an Apache Flink PMC member and Fluss committer. He specializes in backend development for streaming data systems, having made notable contributions to Apache Flink core, the Flink CDC project, and the Flink JDBC connector to improve data type handling, incremental snapshots, and connector reliability. His work demonstrates a strong focus on compatibility and maintainability—fixing subtle type conversion bugs (e.g., unsigned BIGINT, LocalDateTime) and refining module structure and tests for production stability. Based in Hangzhou, he combines deep open-source stewardship with hands-on engineering, driving features that bridge real-world database semantics and stream processing. Collected from both enterprise and Apache roles, his track record shows an ability to influence large-scale open-source projects while delivering robust cloud-native data integrations.
10 years of coding experience
Master's degree, Computer Software Engineering, Master's degree, Computer Software Engineering at Beijing Institute of Technology
Stackoverflow
111reputation
4kreached
10answers
0questions
Github Skills (32)
cdc10
apache-flink10
mysql10
testing10
tableau-api10
unix-timestamp10
jdbc10
data-structure10
java10
scala10
javas10
timestamps10
api10
data-structures10
change-data-capture10
Programming languages (11)
Github contributions (5)
apache/flink-cdc
May 2021 - Nov 2022
Flink CDC is a streaming data integration tool
Role in this project:
Back-end Developer
Back-end DeveloperContributions:13 releases, 1236 reviews, 109 commits in 1 year 6 months
Contributions summary:Leonard primarily contributed to the development and maintenance of the MySQL CDC source connector, bumping dependencies, and adding tests. Their work focused on ensuring compatibility and functionality within the Flink ecosystem, with a focus on incremental snapshot capabilities, and addressing potential data type conversion issues. Furthermore, the user improved the test suite by adding more comprehensive testing for various scenarios, including tables with different data distributions. The impact of these contributions is improved stability and reliability of the connector.
flinkchange-data-captureapachebig-dataspark
apache/flink-connector-jdbc
May 2020 - Apr 2021
Apache flink
Role in this project:Back-end Developer
Back-end DeveloperContributions:13 reviews, 7 commits, 5 PRs in 10 months
Contributions summary:Leonard primarily contributed to the Apache Flink JDBC connector, focusing on bug fixes and improvements to existing functionality. Their work involved addressing issues related to type conversions, particularly handling unsigned BIGINT and LocalDateTime types within the MySQL JDBC driver. Additionally, the user refactored the connector structure, moving classes to the appropriate packages and renaming the module. This suggests a focus on enhancing the connector's stability, compatibility, and maintainability.
flinkconnectorsqldatastreambig-data
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.