# Debye (Pui San) Leong

> UX Systems Architect & Front-end Engineer

This is the online portfolio of Debye Leong, a UX systems architect & front-end engineer.

## How I Work

I use AI as a tool for reflection, reframing, and systems analysis: to challenge assumptions, stress-test decisions, and strengthen judgment rather than outsource it.

### Systems

I look past demo-ready surfaces to find gaps in structure, consistency, and maintainability.

- Vue
- React
- Angular
- HTML5/CSS3/SASS
- Bootstrap
- Section 508
- NPM/Grunt/Bower
- GraphQL
- Node.js
- AWS
- Docker
- Jenkins

### Experience

I work across front-end, UX, and accessibility to make products hold up in real use.

- Interviews
- Usability Evaluations
- Observations
- Surveys
- Card Sorts
- Qualtrics
- Morae

### Judgment

I use AI to test assumptions and surface risks early, without outsourcing decisions or accountability.

- Wireframes
- Personas
- Storyboards
- Balsamiq Mockups
- Axure RP
- Photoshop
- Invision
- Adobe XD

## Selected Work

- [Audit Before the Audit](https://debye.io/projects/audit-before-the-audit/): Reviewed active front-end implementations to surface accessibility, maintainability, and architecture risks before they hardened into project constraints.
- [CUUF Front-end Baseline](https://debye.io/projects/cuuf-front-end-baseline/): Created a reusable front-end foundation for internal applications, defining shared architecture, accessibility, and implementation patterns.
- [AI-Assisted Backend Boundary](https://debye.io/projects/ai-assisted-backend-boundary/): Built a lightweight Node backend boundary for Snowflake data access, improving separation of concerns, code clarity, and future API flexibility.
- [Rhode Island DMV](https://debye.io/projects/rhode-island-dmv/): Rebuilt RI DMV's reservation experience under a tight timeline, improving appointment access, usability, and maintainability.
- [Knowledge Exchange](https://debye.io/projects/knowledge-exchange/): Developed a shared interface for finding company assets across scattered SharePoint repositories.
- [MaintenanceNow](https://debye.io/projects/maintenancenow/): Built a PWA proof of concept that kept maintenance workflows available even when offline.
- [VA Mobile Development](https://debye.io/projects/va-mobile-development/): Extended VA healthcare applications beyond desktop, adapting workflows for mobile and other form factors.
- [Accessibility Evaluation](https://debye.io/projects/accessibility-evaluation/): Evaluated a healthcare website against Section 508 and WCAG guidelines, with recommendations for users with visual disabilities.
- [Information Architecture](https://debye.io/projects/information-architecture/): Restructured product navigation for a global e-retailer using research and card-sort data.
- [COVID Readiness](https://debye.io/projects/covid-readiness/): Rapidly shaped an early COVID readiness idea into a mobile concept that stakeholders could review, discuss, and refine.
- [DML-ES](https://debye.io/projects/dml-es/): Delivered a working prototype that improved usability, efficiency, and Section 508 readiness for a DoD medical logistics system.