Hangjie Mo
Database Engineer
Hangzhou City, Zhejiang, China
Summary
🤩
Rockstar🎓
Top SchoolHangjie Mo is a Database Engineer with a decade of systems and backend experience, blending a BME background from Zhejiang University with a 3.9/4.0 MS in Computer Engineering from Northwestern. After building high-performance network stacks and RPC frameworks at Alibaba Cloud, he now contributes to core components of cloud-native distributed databases at PingCAP, including TiKV and TiDB. His open-source work spans critical fixes and feature additions—such as UTF-8 handling, index scanning improvements, and TiKV client enhancements—demonstrating attention to correctness and performance at scale. Comfortable in Go, Rust, and C/C++, he focuses on query planning, hash joins, and test infrastructure migration to improve maintainability and reliability. Colleagues value his ability to translate deep systems knowledge into production-ready database features and subtle bug fixes that materially improve system behavior.
10 years of coding experience
3 years of employment as a software developer
Master's degree, Computer Engineering, 3.9/4.0, Master's degree, Computer Engineering, 3.9/4.0 at Northwestern UniversityBachelor's degree, Biomedical/Medical Engineering, 3.76/4.00, Bachelor's degree, Biomedical/Medical Engineering, 3.76/4.00 at Zhejiang University
Github Skills (28)
go-modules10
key-value10
testing10
databases10
query-optimization10
tikv10
go10
distributed-transactions10
rust10
relational-databases10
sql-database10
database10
admin9
git9
database-administration9
Programming languages (11)
Github contributions (5)
pingcap/tidb
Aug 2021 - Jan 2023
TiDB - the open-source, cloud-native, distributed SQL database designed for modern applications.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1845 reviews, 120 commits, 460 PRs in 1 year 5 months
Contributions summary:Hangjie's commits primarily focused on refactoring and migrating test infrastructure in the TiDB project. The changes included migrating test infrastructure to `testify` for various components like `sessionctx/stmtctx`, `sessionctx/binloginfo` and `br/pkg/rtree`. Additionally, the user updated the `main.go` file in `tidb-server` to set `mysql.ServerVersion` and `variable.Version` to the configured `ServerVersion`. These contributions indicate a focus on code maintainability and server configuration.
ai-poweredtidbserverlesshtapreal-time
tikv/client-go
Jul 2022 - Nov 2022
Go client for TiKV
Role in this project:Back-end Developer
Back-end DeveloperContributions:7 reviews, 5 commits, 9 PRs in 4 months
Contributions summary:Hangjie primarily contributed to the TiKV client-go repository by updating dependencies and implementing new features. They updated the go.mod file to use the latest versions of various libraries, including `pd/client` and `kvproto`. The user added support for the `kv_prepare_flashback_to_version` command and fixed tests within the project. Additionally, they addressed a bug in the `getMinSafeTSByStores` function, and updated the GCTimeFormat variable.
golanggo-clienttikv
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