JustinĀ Liu
Seattle, Washington, United States
Summary
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RockstarJustin Liu is a Principal software engineering leader based in Seattle with 15+ years designing UIs across form factors from foldable phones to collaborative multi-touch screens. He currently leads Microsoft Store client engineering on Windows 11 and serves as a Principal Group Engineering Manager at Microsoft, blending product and platform ownership with hands-on UX and front-end work. A Windows Expert and the top StackOverflow contributor for Universal Windows Platform, he also contributes to prominent open-source projects such as the Microsoft Graph Toolkit and the Windows Community Toolkit. His career spans UI/UX design and full-stack .NET/UWP/WinUI development, with a public portfolio and UX explorations that surface design-led engineering trade-offs. Colleagues note he truly "sometimes designs and codes, sometimes codes and designs," shipping polished user experiences while mentoring teams to deliver them at scale.
11 years of coding experience
Github Skills (19)
lit-element10
javascript10
xaml10
uwp10
css10
dotnet-new10
dotnet10
winui10
web-components10
ui-design10
uid10
front-end-development10
dotnet-core10
csharp10
tool-kit9
Programming languages (7)
Github contributions (5)
CommunityToolkit/WindowsCommunityToolkit
May 2018 - Feb 2020
The Windows Community Toolkit is a collection of helpers, extensions, and custom controls. It simplifies and demonstrates common developer tasks building .NET apps with UWP and the Windows App SDK / WinUI 3 for Windows 10 and Windows 11. The toolkit is part of the .NET Foundation.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:19 commits, 4 PRs, 7 pushes in 1 year 9 months
Contributions summary:Justin contributed to the Windows Community Toolkit by implementing features and fixing issues related to UI elements, behaviors, and controls. They focused on updating existing components like the TileControl and TokenizingTextBox, incorporating the LoadedImageSurface API and refreshing styling. Their work involved modifying XAML, C#, and related code to improve the functionality and user experience of the toolkit.
mvvmwindows-sdkc-sharpcustom-controlswindows-10
microsoftgraph/microsoft-graph-toolkit
Mar 2019 - Dec 2019
Authentication Providers and UI components for Microsoft Graph š¦
Role in this project:Front-end Developer
Front-end DeveloperContributions:41 commits, 3 PRs, 14 pushes in 9 months
Contributions summary:Justin primarily focused on front-end development within the `microsoftgraph/microsoft-graph-toolkit` repository, contributing to the UI components. Their work included updates to the `graph-persona` and `graph-agenda` components, which involved code formatting, the addition of icon fonts, and updates to styling. They also addressed issues relating to the loading of CSS and improved the login component, demonstrating a focus on user interface and component improvements.
web-componentsperson-cardmicrosoftui-componentsazure-active-directory
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