Zhiyi Zhang
Software Engineer at Meta
Bellevue, Washington, United States
Summary
👤
Senior🎓
Top SchoolZhiyi Zhang is a software engineer with 11 years' experience specializing in database kernel development and performance engineering, now working on programming languages and runtimes at Meta. He has production experience on cloud-native databases including PolarDB and TiDB, where he contributed vectorized implementations and optimizations for many JSON and encryption-related SQL functions in the widely used open-source TiDB project. At Alibaba Cloud he implemented high-availability switching and optimized physical replication for Global Database Network scenarios, improving failover recovery and replication throughput. Based in Bellevue, WA, he brings deep systems-level expertise in low-latency, high-concurrency database internals and a track record of turning complex distributed replication problems into robust, maintainable solutions.
11 years of coding experience
4 years of employment as a software developer
Bachelor's degree Astronomy, Bachelor's degree Astronomy at Nanjing UniversityBachelor's degree Computer Software Engineering, Bachelor's degree Computer Software Engineering at Peking University
Github Skills (8)
json10
databases10
go10
vectorization10
sql10
database10
mysql9
distributed-database9
Programming languages (10)
Github contributions (5)
pingcap/tidb
Oct 2019 - Jan 2020
TiDB - the open-source, cloud-native, distributed SQL database designed for modern applications.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:26 commits, 26 PRs, 94 comments in 3 months
Contributions summary:Zhiyi primarily focused on implementing vectorized evaluations for various functions related to JSON and arithmetic operations within the TiDB database. Their contributions include adding vectorized implementations for functions like `builtinCastRealAsJSONSig`, `builtinCastIntAsJSONSig`, `builtinJSONKeysSig`, `builtinJSONQuoteSig`, `builtinJSONTypeSig`, `builtinJSONObjectSig`, `builtinJSONUnquoteSig`, `builtinJSONContainsSig`, `builtinJSONMergeSig`, `builtinJSONLengthSig`, `builtinArithmeticMinusIntSig`, `builtinUncompressedLengthSig`, `builtinAesEncryptSig`, `builtinJSONKeys2ArgsSig`, `builtinHexIntArgSig`, and `builtinMakeSetSig`. They also optimized `builtinRepeatSig` and `builtinAesEncryptSig` and implemented functions like `builtinJSONArrayInsertSig`, `builtinAesDecryptSig` and `builtinAesEncryptIVSig`.
ai-poweredtidbserverlesshtapreal-time
js00070/tidb
Oct 2019 - Mar 2020
TiDB is an open source distributed HTAP database compatible with the MySQL protocol
Contributions:148 pushes, 60 branches in 4 months
mysqltidbdistributed-databaseorbitdbdatabase
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