Siyuan Zhou - Lead Engineer at MongoDB

Siyuan Zhou

Lead Engineer at MongoDB

New York, New York, United States

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Summary

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Rockstar

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Top School

Siyuan Zhou is a lead engineer with 14 years of experience designing and operating distributed databases, currently building MongoDB Atlas Serverless in New York. He has driven core replication and consensus work at MongoDB—leading a reconfiguration protocol effort that adopted TLA+ model checking and resulted in peer-reviewed publication. His hands-on contributions span server internals, distributed transactions, Raft enhancements, change streams, and production-focused DevOps for MongoDB connectors and Hadoop integration. Siyuan’s work blends research rigor and production engineering: he helped publish Raft results at NSDI and fixed critical replication and authentication bugs in high-profile open-source MongoDB projects. Colleagues rely on him for both protocol design and pragmatic operational fixes that keep clusters consistent and performant. He pairs an NYU CS master’s research background with a track record of turning formal models into deployable, resilient systems.

14 years of coding experience

8 years of employment as a software developer

M.S., Computer Science, M.S., Computer Science at New York University

B.E., Computer Science & Technology, B.E., Computer Science & Technology at Huazhong University of Science and Technology

English, Chinese

Stackoverflow

Stats

381reputation

8kreached

13answers

0questions

Github Skills (27)

hadoop-mapreduce10

c-language10

nosql10

databases10

authentication10

user-authentication10

mapreduce10

hadoop10

java10

mongodb-database10

javas10

replica-set10

cprogramming-language10

replication10

mongodb10

Programming languages (5)

HCLJavaC++JavaScriptTLA

Github contributions (5)

mongodb/mongo

Aug 2013 - Nov 2020

The MongoDB Database

Role in this project:

Back-end Developer & Database Engineer

Contributions:519 commits, 3 PRs, 331 pushes in 7 years 4 months

Contributions summary:Siyuan primarily contributed to the MongoDB database project by addressing server-side issues, focusing on replication, and improving the test suite. Their commits include removing outdated comments, modifying the database's background synchronization process, and writing/modifying test files related to replica sets and rollback operations. They also worked on safe reconfig, added TLA+ specifications, and made code changes to prevent the primary from being behind the syncing node.

nosqlc-plus-plusmongodb-databasedatabasemongodb

mongodb/mongo-hadoop

Nov 2013 - Feb 2014

MongoDB Connector for Hadoop

Role in this project:

Back-end Developer & DevOps Engineer

Contributions:19 commits in 3 months

Contributions summary:Siyuan primarily contributed to fixing bugs and improving the functionality of the MongoDB Connector for Hadoop. Their work includes addressing authentication issues, fixing examples, and updating dependencies to support newer Hadoop versions (2.2.0). They also made changes to testing scripts and configurations, demonstrating involvement in both the core logic and the operational aspects of the project. Additionally, the user addressed deprecated features and implemented code style cleanups.

hadoopconnectormongodb

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