Hi, I'm Manuel.

Craft first. Judgment now.

14+ years in design, the last 8 focused on UX as a Senior Product Designer specializing in design systems. I've built these foundations from the ground up at the World Bank and expanded them at enterprise scale at Apple, covering tokens, components, and the governance that lets product, engineering, and design work as one.

My systems work is supported by hands-on project work in user research, information architecture, and content strategy.

Years of hands-on practice shaped the designer I am, and design systems is where that shows most. What's left to refine isn't the craft itself; it's the judgment behind it: knowing what to hold onto, and what to let go of, so what I build is trusted, not just adopted.

E X P E R T I S E

Design Systems
Design Systems

Building and scaling design systems for enterprise-grade products. From foundational tokens and component libraries to governance and documentation.

Building and scaling design systems for enterprise-grade products. From foundational tokens and component libraries to governance and documentation.

UI & Visual Design
UI & Visual Design

Applying visual craft to the design system as a product. I build for the designers and developers who build with it, so that craft compounds across every product it touches.

Applying visual craft to the design system as a product. I build for the designers and developers who build with it, so that craft compounds across every product it touches.

Research, IA & Content
Research, IA & Content

Broad expertise across user research, information architecture, and content strategy, grounded in hands-on project execution.

Broad expertise across user research, information architecture, and content strategy, grounded in hands-on project execution.

E X P E R I E N C E

2022 — Current

Sr Product Designer, Design Systems — Apple

2020 — 2022

Sr UX Designer, Design Systems and Visual Design Lead — The World Bank

2018 — 2020

UI/UX and Visual Designer — The World Bank

2016 — 2018

Web Designer — US Institute of Peace

2012 — 2016

Web and UI Designer — US Institute of Peace, Global Campus

E D U C A T I O N

2025 — 2026

UC Berkeley Extension
Professional Program in User Experience (UX) Design

2018

General Assembly
UX Design & Human Computer Interaction

2016

General Assembly
Front-End Web Development

2005 — 2009

Universidad de San Carlos de Guatemala
Bachelor of Arts in Graphic Design, Focus in Advertisement

Design systems, UX, and the judgment that connects them. Let's talk.

© 2026 Leon Os Design

Design systems, UX, and the judgment that connects them. Let's talk.

© 2026 Leon Os Design

Design systems, UX, and the judgment that connects them. Let's talk.

© 2026 Leon Os Design