Building Design Systems That Scale
Most design systems die in the gap between Figma and code. Here's how tokens, typed components, and a real handoff keep one alive as the product grows.
Most design systems die in the same place: the gap between Figma and the codebase. The design file says a spacing token is 16px; the code hardcodes 16px in forty places; six months later they've drifted and nobody trusts either one. A design system that scales is one that closes that gap and keeps it closed.
Tokens are the contract
The foundation isn't components — it's tokens. Colour, type scale, spacing, radius, and motion live as named values: Figma variables on the design side, CSS custom properties mapped into the Tailwind theme on the code side. Both sides consume the same source.
The payoff is that a component doesn't know what "black" is. It knows what --foreground is. Change the token once and the design file and every shipped component update together. That single property — one source of truth — is what separates a system that holds from a style guide that rots.
Components with typed, stable APIs
One component, one contract
Each primitive ships as a typed React component with a documented API. Where a component has variants, the props are a discriminated union, so the wrong combination fails at compile time instead of in production.
No prop that hides a missing value
No silent defaults that mask a bug. If something's required, the type says so. The API is the same shape a designer reasons about in Figma, so both representations stay legible to both audiences.
Accessibility solved once
Focus rings via focus-visible, correct ARIA roles, WCAG AA contrast, reduced-motion support — built into the primitive. Every team that uses the system inherits accessible behaviour for free instead of re-solving it per feature.
The test of a system is the fiftieth component
A design system looks great in Figma on day one. The real test is whether the fiftieth component an engineer adds, months later, under deadline, still looks like it belongs. That only happens if the system makes the right thing the easy thing.
So it ships with the boring, essential parts: usage documentation, contribution rules, and annotated specs so the next engineer extends it without re-deriving the rules. It's versioned to evolve safely as the product grows. A system nobody can contribute to without breaking it isn't a system — it's a bottleneck.
Design consistency should be enforced by tokens, not by everyone remembering the rules.
From Figma to production, both halves
The reason this works is that the same person builds both halves — the Figma library and the React implementation — so they're shaped to match. Components in the file map cleanly onto components in code. Tokens in the file are the tokens in the theme. There's no translation layer to drift out of sync, because there's no translation layer at all.
If your design and your code have drifted, or you're standing up a system from scratch and want it built to last, that's the work I do. The booking link is below.
Build the AI layer you'd be proud to ship.
If your roadmap has voice, copilots, RAG, or agentic flows on it, the booking link below is the right move. 30 minutes, no pitch, straight answer on whether I can help.