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Notes on product design engineering: designing in code, building systems that ship, and keeping craft intact as AI collapses the gap between design and production.

Interactive comparison of a lossy design handoff versus crisp in-code implementation

Drag to compare lossy handoff vs. in-code craft

HandoffIn code

The Rise of Product Design Engineers

The old workflow was lossy: design in Figma, hope in handoff. Product Design Engineers design in the medium itself, and AI finally made that scale.

Ernest LiuMay 24, 2026