Discipline / Design Engineering Tier / World-Class Scope / Skills Rev / 2026 · Non-exhaustive
David Paterni

The Design
Engineer.

The rare overlap where taste and engineering share one head — someone who designs the work and ships it, and won't hand either half to anyone else.

Portrait of David Paterni
01

Craft &
Visual Systems

Reads a layout in pixels and optical weight — never approximations.

Typographic scale & rhythm Optical alignment Modular grids Color & contrast theory Hierarchy & emphasis Composition & balance Sub-pixel precision Light / dark theming Negative space
02

Interaction
& Motion

Motion that explains state instead of decorating it.

Easing & spring physics Choreography & staggering Enter / exit orchestration Gesture & drag State transitions Perceived performance Reduced-motion fallbacks Web Animations API · Motion · GSAP
03

Front-End
Engineering

Ships production code, not handoff files.

TypeScript React · hooks · composition · RSC Semantic HTML CSS Grid & Flexbox Container queries :has() & cascade layers Custom properties · clamp() Tailwind · vanilla-extract · CSS Modules Browser rendering model State management
04

Design Systems
& Tokens

Builds the system that makes everyone else faster.

Tokens · primitive → semantic → component Component API design Composition · slots · polymorphism Controlled / uncontrolled patterns Headless primitives · Radix · React Aria Multi-brand theming · Style Dictionary Versioning & distribution Storybook documentation Contribution & governance
05

Accessibility

Treats WCAG as the floor, not the goal.

WCAG 2.2 AA Semantic structure & ARIA Keyboard navigation Focus management Screen-reader testing Contrast & visibility prefers-reduced-motion Accessible primitives from scratch
06

Prototyping &
AI-Assisted Build

Resolves the hard interaction in code before engineering commits.

High-fidelity coded prototypes Figma · variables · auto-layout · variants Code-vs-canvas judgment Cursor · v0 · Claude · Copilot Rapid throwaway exploration Faithful spec handoff Custom tooling & plugins
07

Engineering
Practice

Lives in the codebase like an engineer, and reviews like one.

Git & pull requests Code review Visual regression · Chromatic · Playwright CI awareness Monorepos Core Web Vitals & perf budgets Reading API contracts DevTools debugging
08

Product &
Systems Thinking

Designs the edge case, the empty state, and the failure mode.

Problem framing & scoping Complex, data-heavy workflows Empty · loading · error states Information architecture Analytics · funnels · experiments UX writing Measuring craft impact Tradeoff negotiation
What Makes It World-Class
A

One head, both crafts

Taste and engineering in the same person — not two specialists in a trench coat.

B

Bias to shipped

The product is the deliverable; the Figma file is scaffolding you throw away.

C

Detail that scales

Quality that holds across every role, state, and edge case — not just the happy path.

D

Knows the system cold

Fluent enough in the rules to know exactly when to break them.

E

Fluent in both rooms

Speaks design to engineers and engineering to designers, and is trusted in each.

F

Speed without debt

Fast because the foundations are clean — not fast at the foundations' expense.