jeff mills
Principal front-end engineer.
I'm Jeff Mills, a Principal-level Front-End Engineer with 20+ years across Philadelphia agencies and Vanguard. The agency years taught me speed; Vanguard taught me scale. The instincts compose. I architected Vanguard's framework-agnostic design system (AXS) and work hands-on at the intersection of design systems and generative AI. Based in the Philadelphia area.
- About read more
20+ years across paradigm shifts. Player-coach. Currently architecting Vanguard's framework-agnostic design system.
- Projects 1 live
Side projects and demos — currently the Gen UI two-stage Claude tool-use pipeline.
- Writing 2 posts
Production notes on design systems, generative UI, and front-end architecture.
- Press 8 outlets
Coverage of work led at Vanguard FAS — Expert Insights launch, April 2026.
- Contact email
Reach out about principal front-end work.