Philip Warkentien II

Philip Warkentien II

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ABOUT ME
Staff Frontend & UI Engineer (13+ yrs) — Design Systems, CSS, React
Staff Frontend & UI Engineer (13+ yrs) — Design Systems, CSS, React

About me

I’m a Staff-level Frontend and UI Engineer with 13+ years of combined professional and teaching experience, specializing in UI engineering: Design Systems, enterprise CSS, responsive layouts, accessibility (WCAG), data visualization, and web animations — with deep expertise in React, JavaScript/TypeScript, HTML, and CSS.

Throughout my career, I’ve consistently operated as the bridge between Design and Engineering, translating ambitious visual and UX goals into scalable, performant, and accessible frontend systems. My work focuses on aligning design intent with real-world engineering constraints while maintaining long-term maintainability and code quality.

I’ve led and contributed to Design System initiatives, built data-visualization–heavy charts, tables, and UIs, improved localization workflows, and helped raise UI standards across critical user flows in large, high-impact products. A recurring part of my work involves untangling legacy stylesheets and transforming them into clean, enterprise-grade CSS and component architectures.

In addition to hands-on engineering, I bring 5.5 years of experience as a Udacity mentor, where I guided developers through frontend, UI, and JavaScript projects, reviewed real-world codebases, and helped engineers progress from fundamentals to production-ready practices. I mentor because I enjoy helping developers move beyond surface-level fixes and truly understand why UI breaks — whether it’s layout mechanics, rendering behavior, accessibility pitfalls, or component design.

Portuguese, English
Central Time (US & Canada) (-06:00)
Joined November 2015
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SOCIAL PRESENCE
Stack Overflow
868 Reputation
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EMPLOYMENTS
Lead Software Engineer
Anywhere Real Estate
2025-01-01-Present

Converted from contract to full-time based on sustained impact and ownership of complex frontend systems.

  • Drove platform-le...

Converted from contract to full-time based on sustained impact and ownership of complex frontend systems.

  • Drove platform-level SEO and performance improvements, delivering measurable LCP (~0.8s reduction), FCP, and CLS (~0) gains through system-wide frontend optimizations.
  • Designed and implemented a scalable image handling strategy (local + CDN), including dynamic sizing, lazy loading, fetch priority, and abstractions; reduced image payloads by 100×+ (e.g., 124MB → 1MB).
  • Delivered and evolved high-traffic UI surfaces, balancing UX, accessibility, performance, and engineering constraints—often contributing as both UI Designer and UI Engineer when designs were not fully defined.
  • Resolved long-standing frontend reliability issues impacting SEO and UX, including routing duplication, missing location metadata, and SEO-safe 404 handling.
  • Built complex, reusable frontend components, including animated SVG gauges, an accessible tethered Tooltip, and a lightweight Charting Library (without D3).
  • Developed Node.js auditing tools for image optimization and performance validation, enabling repeatable, data-driven improvements.
  • Contributed to the Design System via documented patterns, /design pages, READMEs, and test-as-documentation examples.
  • Served as a frontend Subject Matter Expert (SME) for images, SVG, animation, CSS edge cases, accessibility, and performance, providing high-impact code reviews and architectural guidance.
SEO
TypeScript
Accessibility
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SEO
TypeScript
Accessibility
GitLab
React
Redux
Figma
Design Systems
ChatGPT
Copilot workspace
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UI Engineering Consultant
Warkentien2
2019-06-01-2025-01-01
  • Senior UI Consultant and Design System Lead for Apple, building data-intensive UIs (APR. 2024 - JAN. 2025)
  • Tackling short...
  • Senior UI Consultant and Design System Lead for Apple, building data-intensive UIs (APR. 2024 - JAN. 2025)
  • Tackling short to mid-term UI Engineering projects, connecting Design and Engineering teams.
  • Implemented the base responsive UI and design system for Closer and Forward.
  • Debugged and developed complex interactive UI and animations for Terra, Stakwe, and Wet Fish.
HTML/CSS
D3.js
TypeScript
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HTML/CSS
D3.js
TypeScript
React
Data Visualization
Redux
GraphQL
Design Systems
Tailwind css
Chakra UI
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Staff Software Engineer
PayPal
2022-07-01-2023-03-01
  • Served as the Checkout team's primary consultant for localization initiatives, including translation management and resolvin...
  • Served as the Checkout team's primary consultant for localization initiatives, including translation management and resolving a persistent component issue for the German market, resulting in a comprehensive solution that enhanced localization processes.
  • Routinely proposed UI improvements and feature changes, identifying potential impact to maintain and improve user interface standards.
  • Applied Scrum methodologies and best practices to drive team alignment and collaboration, resulting in the persistent progression and completion of project tasks.
  • Pioneered the improvement of top-of-funnel metrics, presenting insight-driven proposals to senior management that would increase top-of-funnel by 600%.
HTML/CSS
Localization
TypeScript
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HTML/CSS
Localization
TypeScript
React
Software Development
Scrum Master
Redux
FinTech
Software architecture
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