Hire — Sammii Kellow

Senior frontend / design engineer.London. UK citizen. Available for permanent or contract.

Prism is the proof-of-craft — cursor-reactive UI primitives, spring physics, zero runtime dependencies, shipped every day by an autonomous pipeline I built and maintain.

London · UK citizen · permanent or contract · remote or hybrid

Roles targeted

What Prism proves

Five things this codebase is evidence of.

  1. 01

    Design systems & design tokens

    Every surface on this site is driven by one primitive colour system — `pastelColour`, `colourField`, `colourBlend` — mapping cursor position to RGB. One palette, many components, always in sync. That's a token system with physics, not Figma exports.

  2. 02

    Interaction & motion craft

    No animation libraries. Every component integrates position and velocity every frame via hand-rolled `requestAnimationFrame` spring equations. Overshoot, damping, settle — motion that feels alive, not scripted.

  3. 03

    Frontend performance

    A single shared pointer listener drives every cursor-reactive surface. Preview frames pause via `IntersectionObserver` when offscreen. Zero runtime dependencies beyond React and Next. One file per component.

  4. 04

    Accessibility as craft, not checklist

    The command palette below has a real focus trap, `aria-activedescendant` between input and list, keyboard-only navigation, and a `prefers-reduced-motion` guard that swaps spring animation for an instant state change.

  5. 05

    Autonomous systems

    A Claude-driven pipeline scouts patterns, curates a brief, builds the component, records a video, and publishes to X — every day. Code on GitHub, daily log on the portfolio.

Featured components

Four live demos, rendered inline.

No screenshots. No iframes. These are the same components as on the rest of the site, running in the same React tree as this page.

ripple-buttonlive

Cursor-position tints each ripple. Spring-physics scale on press.

morph-tabslive

Your project at a glance. Key metrics, recent activity, and quick actions.

Active pill morphs between tabs with spring-damped width and x.

floating-docklive

Magnetic magnification — neighbours scale with a falloff curve.

command-palettelive
accessible

Press ⌘K or click below.

Real focus trap, aria-activedescendant, ⌘K and prefers-reduced-motion aware.

Get in touch