Interaction systems in practice. A 40-second reel spanning OS and SDK input and interaction work across HoloLens, MRTK, Meta Quest, and the Meta XR Interaction SDK, alongside independently shipped projects including Type In Space and Cosmic XR. HoloLens, MRTK, Meta Quest, Meta XR Interaction SDK, Type In Space, and Cosmic XR.

Yoon Park

Principal Product Designer • Spatial Computing & XR • Interaction Systems

Yoon (Dong Yoon Park, 박동윤) is a Principal Product Designer at Meta Reality Labs, defining platform-level spatial input and interaction systems across Meta Quest and Horizon OS.

He turns emerging input research into coherent product capabilities. His work aligns hands, eyes, voice, controllers, stylus, keyboards, and microgestures into interaction models that scale across products, partner teams, and developer ecosystems.

Previously at Microsoft, he led design for the Mixed Reality Toolkit (MRTK), HoloLens developer experience, and the Microsoft Mesh design language. He translated new interaction paradigms into reusable systems adopted across the XR ecosystem.

His independent work, including Cosmic XR, Type In Space, Typography Insight, and Spatial Computing: XR Interaction Design, keeps his practice grounded in making, shipping, and teaching.

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Platform & Ecosystem Leadership

Selected work showing how I connect interaction strategy, systems thinking, and implementation across products and developer ecosystems.

Meta Horizon OS input ranking and interaction hierarchy

Meta Quest & Horizon OS

Leading platform-level spatial input and interaction design across the general-purpose computing input stack. Aligning design, research, engineering, product, and partner teams to turn emerging modalities into coherent OS and SDK capabilities.

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Mixed Reality Toolkit spatial UI and interaction components

Microsoft HoloLens & MRTK

Defined reusable spatial interaction systems, UI building blocks, tooling, documentation, and partner guidance across HoloLens, MRTK, and Microsoft Mesh. Connected design intent with engineering implementation and open-source adoption at ecosystem scale.

View the MRTK case study →

MSN apps cross-platform visual system

Cross-Platform Product Systems

Led a shared MSN design system across Windows, iOS, Android, and the web, unifying information architecture, navigation, visual language, and reusable patterns while adapting to each platform’s constraints.

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Spatial Computing: XR Interaction Design book

Book: Spatial Computing: XR Interaction Design

Cosmic XR

Cosmic XR

K-Pop Atlas

K-Pop Atlas

Type In Space for HoloLens 2

Type In Space for HoloLens 2

Typography Insight

Typography Insight

“Anyone who loves books, words, history, or fine art, even in the slightest bit, will find Typography Insight as intoxicating as Wikipedia and as fun as a video game.”

Fast Company

“The app isn’t a dull list of typefaces. It’s excitingly interactive, enabling you to experiment with kerning to see how it transforms the way text looks, and to compare the same characters in different typefaces.”

Apple