Taylor Mullen
Principal Engineer - Gemini CLI at Google
Seattle, Washington, United States
Summary
🤩
Rockstar🎓
Top SchoolTaylor Mullen is a principal engineer with 13 years of experience building developer tooling and AI-first experiences, currently leading the Gemini CLI at Google to make the terminal more powerful and agentic. Previously he shaped Visual Studio Copilot and .NET tooling at Microsoft, founding the Razor Tooling team and launching the .NET Install Tool for VS Code (now with millions of installs). His background spans compiler work, language services, and build/DevOps automation—frequently modernizing large codebases and CI pipelines across prominent .NET projects like ASP.NET Core, EF Core, and the Razor/Blazor ecosystems. Taylor combines deep systems-level engineering with product instincts, driving cross-team integration and measurable adoption gains (e.g., major uptime and onboarding improvements in code-index services). He’s an active open-source contributor with practical improvements to tooling, parsers, and extensions that improve developer productivity. Based in Seattle, he holds a BS in Computer Science from Drexel and maintains a knack for turning migration headaches into robust, automated build and runtime solutions.
13 years of coding experience
17 years of employment as a software developer
Bachelors Computer Science, Bachelors Computer Science at Drexel University
Github Skills (74)
dependency-management10
nuget10
parser10
compile-time10
testing10
asp-net-core10
asp-net10
automation10
code-generation10
build-automation10
model-binding10
netcore10
blazor-server10
razor10
javascript10
Programming languages (8)
Github contributions (5)
aspnet/Razor
Jan 2014 - Nov 2018
[Archived] Parser and code generator for CSHTML files used in view pages for MVC web apps. Project moved to https://github.com/aspnet/AspNetCore
Role in this project:
Frontend Developer
Frontend DeveloperContributions:709 commits, 708 PRs, 1556 pushes in 4 years 10 months
Contributions summary:Taylor primarily focused on improving the Razor parser by updating tests to reflect changes in the length provided for Razor errors. They also addressed issues related to the display of markup, code blocks, and HTML comments within Razor views, including issues related to nesting and incomplete tags. Their contributions included enhancements to brace completion, string literal handling, and code generation for template attributes.
in-viewaspnetcode-generatorweb-appscshtml
dotnet/razor
Nov 2018 - Aug 2022
Compiler and tooling experience for Razor ASP.NET Core apps in Visual Studio, Visual Studio for Mac, and VS Code.
Role in this project:Back-end Developer
Back-end DeveloperContributions:1470 reviews, 471 commits, 1261 PRs in 3 years 9 months
Contributions summary:Taylor contributed to the Razor compiler and tooling for ASP.NET Core applications, focusing on resolving issues and implementing features related to Razor components. They worked on the SDK and other related tools to ensure that code compilation and features like IntelliSense operated correctly. Their contributions involved refactoring code to improve performance and address platform-specific quirks.
razortoolingaspnetvisual-studio-for-macvscode
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