Bryan M
Senior Software Engineer at Duolingo
Pittsburgh, Pennsylvania, United States
Summary
🤩
Rockstar🎓
Top SchoolBryan M is a Senior Software Engineer with 11 years of professional experience and a long tenure at Google before joining Duolingo, bringing deep expertise in Go and systems-level engineering. He has made substantive contributions to core Go projects—including go, crypto, net, and build—improving module loading, test robustness, concurrency primitives, and cryptographic correctness in repositories that underpin the Go ecosystem. Bryan blends backend development with DevOps and test automation, routinely fixing flaky tests, streamlining build infrastructure, and automating multi-platform builds. His work shows a pragmatic focus on reliability and security, from addressing races and timeouts to hardening crypto and network tests. A Carnegie Mellon CS graduate with a 3.95 GPA, he is comfortable navigating both language internals and large-scale engineering workflows. Notably, his contributions often target subtle, high-impact issues (test environment quirks, module graph pruning, buildlet automation) that materially improve developer productivity and system stability.
11 years of coding experience
18 years of employment as a software developer
Bachelor of Science - BS, Computer Science, 3.95, Bachelor of Science - BS, Computer Science, 3.95 at Carnegie Mellon University School of Computer Science
Spanish
Stackoverflow
4,819reputation
1.0mreached
135answers
0questions
go
top-1%
Github Skills (52)
dependency-management10
go-modules10
file-management10
package-management10
protocol-buffers10
testing10
it-security10
http10
configuration-management10
build-system10
network-programming10
cicd10
security10
go10
ipv610
Programming languages (13)
Github contributions (5)
golang/sync
Jul 2016 - Oct 2020
[mirror] concurrency primitives
Role in this project:
Back-end Developer
Back-end DeveloperContributions:12 commits in 4 years 3 months
Contributions summary:Bryan primarily contributed to the `golang/sync` repository, focusing on concurrency primitives. The commits involved adding and fixing features related to concurrent programming, particularly with the `errgroup` and `syncmap` packages. The user's work also included addressing build errors, and improving documentation, thereby enhancing the library's robustness and usability for developers working with concurrent Go code.
concurrencyrustasyncprimitives
golang/go
Nov 2018 - Jan 2023
The Go programming language
Role in this project:Back-end Developer
Back-end DeveloperContributions:187 commits, 2 PRs, 14105 comments in 4 years 2 months
Contributions summary:Bryan's contributions primarily focused on enhancements and optimizations to the Go programming language, particularly concerning module loading. Their work involved significant improvements to the 'go mod download' process, ensuring more efficient downloading of dependencies in 'go 1.17' and later. They also contributed to refining the code for graph pruning, ensuring better consistency in the module graph, and addressing critical issues related to build cache inconsistencies. This involved modifications to the internals of the module loading and dependency management systems.
golanggopluscompilerprogramming-languageinterpreter
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