Liu Xiaohua
Software Engineer at StarRocks
Singapore
Summary
🤩
Rockstar🎓
Top SchoolLiu Xiaohua is a software engineer with 10 years of experience, currently working at StarRocks in Singapore on high-performance query engines. He specializes in back-end systems for analytics databases, contributing to core query processing, memory management, and robustness for projects like StarRocks and the widely used Apache Doris. His work includes removing deprecated dependencies, fixing subtle bugs (e.g., null-aware joins and bitmap index scanning), and plugging memory leaks, showing attention to both performance and long-term maintainability. Comfortable navigating large C++/systems codebases, he focuses on pragmatic refactors and defensive engineering that prevent regressions in production. Educated at Huazhong University of Science and Technology, he pairs solid academic grounding with a decade of hands-on open-source collaboration. A less obvious strength is his knack for cleaning technical debt—deleting unused code and simplifying build dependencies to reduce future maintenance risk.
11 years of coding experience
Huazhong University of Science and Technology
Github Skills (23)
apache-doris10
c-language10
databases10
query-optimization10
analytics10
performance-optimization10
sql10
backend10
cprogramming-language10
relational-databases10
sql-database10
database10
llvm9
data-structure9
admin9
Programming languages (5)
Github contributions (5)
StarRocks/starrocks
Sep 2021 - Jan 2023
The world's fastest open query engine for sub-second analytics both on and off the data lakehouse. With the flexibility to support nearly any scenario, StarRocks provides best-in-class performance for multi-dimensional analytics, real-time analytics, and ad-hoc queries. A Linux Foundation project.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:3502 reviews, 496 commits, 2134 PRs in 1 year 4 months
Contributions summary:Liu primarily focused on bug fixes and performance improvements within the StarRocks codebase. Their contributions involved resolving issues in the processing of null-aware left anti joins, memory leak in lz4 decompress, and scanning using bitmap index. In addition, the user implemented defensive measures to prevent errors and made code refactoring and deletion of unused code for the non-vectorized execution engine.
data-lakehouselinuxquery-enginestarrocksdatabase
apache/doris
Feb 2020 - Feb 2020
Apache Doris is a real-time analytics and hybrid search database for AI agents.
Role in this project:Back-end Developer
Back-end DeveloperContributions:8 commits, 10 PRs, 7 comments in 6 days
Contributions summary:Liu focused on removing unused LLVM-related code from the Apache Doris codebase, specifically targeting directories related to execution and expression evaluation. They addressed build issues by removing deprecated LLVM dependencies and related code. The user also fixed a test case related to bitmap predicate, ensuring the correctness of segment writer operations. Additional contributions include updates to aggregation and hash join nodes, demonstrating involvement in core query processing components.
ai-agentapache-dorisdatabaseolaphudi
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