About Nancy Miller, Product Design Lead

Who I Am

Designing for humans, at scale

I'm Nancy, a Product Design Lead with 12+ years shaping AI-driven, data-informed, and user-centered solutions at global companies including Yahoo! and eBay. I specialize in end-to-end UX strategy, scalable design systems, and integrating emerging AI technologies to create inclusive, intuitive, and impactful user experiences.

My career spans from building advanced data visualization dashboards and redesigning Yahoo! Mail's navigation, to leading AI-powered product innovations at eBay that improved conversion, reduced seller effort, and set new standards for automation in commerce. I thrive at the intersection of design and engineering, turning complex problems into elegant, scalable solutions that balance user needs with business outcomes.

Beyond design, I'm a proud mom, climate advocate, enthusiastic traveler, minimalist, and amateur chef.

Skills & Expertise

What I Bring to the Table

UX & Product Design

Journey mapping, prototyping, responsive design, usability testing, from first sketch to polished, shipped product.

AI-Driven UX

Predictive interfaces, LLM-integrated workflows, prompt engineering, and behavioral analytics for next-generation products.

Design Systems

Scalable architecture, component libraries, WCAG 2.1 accessibility, and full RTL/LTR internationalization support.

Research & Strategy

Diary studies, contextual inquiry, synthesis frameworks, and data-driven decision making that shapes product roadmaps.

Mobile Design

Native-first thinking for iOS and Android. Complex workflows translated into intuitive, high-performing mobile experiences.

Cross-functional Leadership

Agile/Scrum collaboration, Figma-to-code handoff, mentoring designers, and partnering with engineering and PMs.

Agentic AI & AI Workflows

Building AI agents, prompt engineering for LLMs, and embedding agentic AI tools like Claude, Glean, and GPT into product design workflows, accelerating research, ideation, and delivery at scale.

Business Impact & Metrics

Connecting every design decision to measurable outcomes: from 40% faster listing creation to $2M in influenced investments, through data analysis, experimentation, and executive-level storytelling.

Tools I Use

Figma Adobe XD Sketch Miro Jira Notion Hotjar Mixpanel Tableau Google Analytics InVision UserTesting

AI Tools

Claude (Anthropic) Claude Code ChatGPT / GPT GitHub Copilot Glean Agentic AI Midjourney Runway ML Perplexity AI Framer AI

Career Path

Experience

eBay

Jun 2023 – Present

eBay

Lead Product Designer

San Jose, USA

Named eBay AI Ambassador (2026): selected company-wide to lead AI design culture, mentor cross-functional teams on AI-integrated UX, and define eBay's internal AI design standards.
Launched AI-powered "Magical Listings" flow, cutting listing creation time by 40% and improving specification accuracy by 28%.
Led design system improvements across 5 product teams, boosting component reusability by 30% and ensuring global brand consistency.
Building a data-driven Store dashboard with advanced AI automation, interactive charts, and key seller metrics (traffic, conversion, CLV, buyer insights).
Optimized prototyping processes to reduce ideation-to-testing cycle time by 30% and strengthen system scalability.
Spearheaded user research with buyers and sellers to identify UX friction points, directly influencing product roadmap priorities.

Yahoo! Ads

May 2017 – Feb 2023

Yahoo! Ads (DSP)

Senior UX Designer

Sunnyvale, USA

Designed and launched a mobile DSP (iOS/Android), increasing advertiser engagement by 27% and boosting campaign renewal rates by 15%.
Shaped product roadmap through user feedback and analytics, guiding over $2M in new feature investments.
Led design of advanced analytics dashboards with intuitive data visualization, reducing campaign analysis time by 38%.
Architected and scaled a design system adopted by 4 internal products, cutting UI development time by 30%.
Mentored junior designers and researchers, fostering a culture of experimentation and continuous learning.

Yahoo! Mail

Feb 2015 – May 2017

Yahoo! Mail / Media

UX Designer

Sunnyvale, USA

Directed a major redesign of Yahoo! Mail's navigation and theme system, improving task efficiency by 30% and reducing bounce rate by 20%.
Implemented accessibility-first design practices, raising WCAG compliance from 68% to 96%.
Boosted user engagement by 25% through infinite scroll and front-end performance enhancements.
Improved SEO and page load speed, increasing organic traffic by 17% through semantic HTML and site optimizations.

Yahoo! EMEA

Feb 2013 – Feb 2015

Yahoo! EMEA

Frontend Engineer

Amman, Jordan

Led bi-directional (BiDi) interface rollout across 7 major Yahoo! portals, expanding accessibility for millions of RTL-language users.
Created localization automation tools that reduced translation overhead by 60%.
Acted as regional design advocate (EMEA), ensuring local user needs were reflected in global product strategy.