Timothy Clem
Software Engineer at GitHub
San Francisco, California, United States
Summary
🤩
RockstarTimothy Clem is a seasoned software engineer based in San Francisco with 15 years of experience and a GitHub tenure since 2011. He specializes in back-end systems, compilers, and cross-language tooling—contributing to high-profile open-source projects such as libgit2, tree-sitter, and the ViewComponent framework for Rails. His work spans low-level Git plumbing and bindings (libgit2, LibGit2Sharp, Objective-Git), language parsing and scope-graph improvements (semantic, tree-sitter), and practical API ergonomics and testing across ecosystems. Comfortable in both .NET and native C/Objective-C environments, he blends careful refactoring, platform compatibility fixes, and test-driven feature design. Colleagues will notice his eye for subtle API usability improvements (custom collection parameter names, authentication hooks) and a track record of making complex parsing and memory-management code more robust.
15 years of coding experience
Github Skills (52)
objective-c10
git10
libgit210
tree-sitter10
licensing10
python10
apidoc10
component-design10
testing10
net10
dotnet10
rails10
c1110
regex10
mvvm10
Programming languages (18)
Github contributions (5)
github/semantic
Aug 2016 - Nov 2020
Parsing, analyzing, and comparing source code across many languages
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 releases, 1 review, 3133 commits in 4 years 3 months
Contributions summary:Timothy's commits focused on improving the parsing and representation of source code. This included changes to the code base to handle function and class definitions, as well as adding support for additional language constructs in Python. The user also refactored and extended the scope graph data structures to support the new constructs.
parsingkeep
libgit2/libgit2sharp
Mar 2011 - Aug 2012
Git + .NET = ❤
Role in this project:Back-end Developer
Back-end DeveloperContributions:101 commits in 1 year 4 months
Contributions summary:Timothy primarily contributed to the core functionality of the LibGit2Sharp library. Their commits demonstrate the creation of .NET Framework projects, solutions and assembly, and interop refactoring. The changes include creating new classes, methods, and structures related to the underlying libgit2 library, indicating a focus on the library's internal workings. These commits showcase the development of low-level Git features and the library's core components.
dotnetlibgit2version-controldotnet-core
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