Lingzhi Deng
Senior Lead Engineer at MongoDB
New York City Metropolitan Area United States
Summary
🤩
Rockstar🎓
Top SchoolLingzhi Deng is a Senior Lead Engineer with 11 years of experience specializing in database engines and distributed systems, currently leading engineering efforts at MongoDB in the New York City area. She has a track record of improving replication, write concern semantics, and schema-change robustness—contributions visible in prominent open-source projects including MongoDB and Bloomberg’s comdb2. Lingzhi bridges deep systems-level expertise with pragmatic engineering: she’s implemented future-based APIs for write concern, hardened multi-document transaction paths, and eliminated subtle memory and schema-change bugs. Her background includes earlier database engine work at Bloomberg, SAP, and BlackBerry, giving her a practical appreciation for performance, correctness, and operational edge cases. Notably, she combines hands-on coding on critical database components with leadership in production-grade delivery and testing.
11 years of coding experience
6 years of employment as a software developer
University of Waterloo
Github Skills (20)
c-language10
databases10
database-administration10
schema-design10
mongodb-database10
schema-org10
sql10
database-design10
cprogramming-language10
replication10
mongodb10
schema10
concurrency10
database10
concurrent9
Programming languages (4)
Github contributions (5)
bloomberg/comdb2
May 2017 - Mar 2019
Bloomberg's distributed RDBMS
Role in this project:
Back-end Developer / Database Engineer
Back-end Developer / Database EngineerContributions:139 commits, 254 PRs, 120 pushes in 1 year 10 months
Contributions summary:Lingzhi primarily contributed to the database and schema change components. Their work focused on improving the efficiency and robustness of schema changes, including handling constraints within transactions. They implemented logic to handle different scenarios in the schema change process and added test cases to ensure correct behavior. The user also made various improvements to database functionality and solved several memory leaks and other bugs.
bloombergdatabaserdbmsdistributed
mongodb/mongo
Mar 2019 - Jan 2023
The MongoDB Database
Role in this project:Database Engineer / Database Administrator
Database Engineer / Database AdministratorContributions:2 reviews, 416 commits, 4 PRs in 3 years 10 months
Contributions summary:Lingzhi's contributions focused on implementing a future-based API for waiting for write concern, as well as other database level improvements. This primarily involved modifying and adding new methods to the `ReplicationCoordinatorImpl` class. Their work included changes to handle errors in different scenarios, such as during startup or when dealing with multi-document transactions. The user's commits centered around ensuring the robustness of the MongoDB database's replication and write concern mechanisms.
nosqlc-plus-plusmongodb-databasedatabasemongodb
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