Patrick Freed
Software Engineer at MongoDB
Chevy Chase, Maryland, United States
Summary
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Rockstar🎓
Top SchoolPatrick Freed is a software engineer with 14 years of experience focused on database drivers, back-end systems, and cross-platform tooling, currently contributing to MongoDB’s Rust and Swift drivers and BSON libraries. He has deep practical experience improving drivers and core database components—implementing async connection pooling, refining server selection, and optimizing index management across C++, Rust, Go, and C++ codebases. Patrick’s work spans performance, reliability, and cross-platform compatibility, including Windows test tooling and gRPC integration, and he frequently improves specs and docs to reduce ambiguity for implementers. A strong systems thinker with a 3.9 dual degree in Mathematics and Computer Science from the University of Maryland, he also brings security-minded engineering from earlier internships where he built detection and response tooling. Notably, he combines low-level efficiency changes (move semantics, decoding fixes) with high-level API and spec work, making him effective at both implementation and ecosystem stewardship.
14 years of coding experience
The University of Maryland, College Park
English
Stackoverflow
51reputation
3kreached
3answers
0questions
Github Skills (46)
asynchronous10
c-language10
multiplatform10
gridfs10
scripting10
go-language10
async10
testing10
databases10
data-serialization10
cross-platform10
network-programming10
mongodb-database10
serialization10
deserialization10
Programming languages (11)
Github contributions (5)
mongodb/bson-rust
May 2020 - Jan 2023
Encoding and decoding support for BSON in Rust
Role in this project:
Back-end Developer
Back-end DeveloperContributions:10 releases, 211 reviews, 72 commits in 2 years 8 months
Contributions summary:Patrick contributed to the `bson-rust` repository by improving error handling and fixing various issues related to BSON decoding and encoding. Their work involved rephrasing error messages, fixing incorrect datetime implementations, and improving the round-tripping of Decimal128 values. The user also refactored code, improved documentation with examples, and modernized the project by replacing the `linked-hash-map` with `indexmap`, which involved updating APIs.
decodingbsonrustserializationencoding
mongodb/mongo-rust-driver
Jun 2019 - Jan 2023
The official MongoDB Rust Driver
Role in this project:Back-end Developer
Back-end DeveloperContributions:16 releases, 851 reviews, 205 commits in 3 years 8 months
Contributions summary:Patrick primarily contributed to the implementation of the asynchronous CMAP (Connection Management and Pooling) in the MongoDB Rust Driver. They focused on adding async functionality to the CMAP layer and also addressed race conditions within the testing framework. This includes the creation of new connection logic, along with fixes to ensure proper handling of events and connection pool states when errors occur. They were also responsible for improving the driver's server selection capabilities and for refactoring aspects of the API related to authentication.
rustrust-drivercargodatabasemongodb-driver
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