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05Design Systems2023 — 2025

Production Design System

SectorDesign Systems
Period2023 — 2025
Delivered viaBlue Window Ltd.
01The brief

What was actually broken.

Teams were rebuilding the same components against the same Figma files and getting different results each time. Nothing was documented, visual regressions shipped unnoticed, and page performance was drifting downward release by release.

02Engineering lens

How it was built.

The architecture, the constraints it was chosen against, and the trade-offs that came with it.

Built the library on atomic design principles, taking each component from Figma mockup through to a fully responsive, optimised widget with accessibility and web standards respected rather than retrofitted. Storybook became the single source of documentation, with Chromatic running visual regression on every change so a styling regression failed CI instead of reaching production. Performance budgets were enforced as part of the same pipeline.

Stack

TypeScriptReactNext.jsStorybookChromaticTailwind CSSStyled Components
03Business lens

What it moved.

Measured after delivery, against the numbers the engagement started from.

Core Web Vitals
Best achievable
Component documentation
Full coverage
Visual regressions in production
Eliminated