Lucas Coutinho
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Core Design System

Scalable multi-brand token architecture and accessible component foundation for digital ecosystems.

Core Design System Product Design Case Study
PapelLead Design Systems Architect
Duração8 months (Q2-Q4 2024)
PlataformaCross-Platform (React Web, iOS & Android Tokens)
Equipe1 Design System Lead (Lucas), 3 Front-End Engineers, 1 Accessibility Specialist
01 / OVERVIEW

Architected a unified enterprise design system connecting product design and front-end engineering teams through semantic tokens and automated CI/CD governance.

Lead Systems Architect managing typography, color, and layout tokens via Style Dictionary, alongside technical specifications for 40+ accessible React component primitives.

02 / CONTEXT
Context

The enterprise operated 4 distinct digital products with duplicate codebases, fragmented UI patterns, and severe accessibility compliance gaps causing continuous friction between design and dev.

The Problem

Updating a single brand color or button style required weeks of manual alignment and multi-repository refactoring.

03 / DISCOVERY & RESEARCH

A comprehensive technical audit uncovered 142 distinct hardcoded hex values in production code and over 30 redundant button variations across web applications.

04 / KEY DESIGN DECISIONS
DECISION 01Three-Tiered Semantic Token Architecture

Structuring token layers (Globals, Semantics, Components).

Razão:

Allowed instant theme and brand switching without altering underlying React component code.

Trade-off:

Slightly increased initial taxonomy complexity during onboarding.

Resultado:

Reduced new brand theme creation time from 3 weeks to 2 days.

DECISION 02Strict Automated Accessibility CI Gates

Ensuring WCAG 2.2 AA compliance across all pull requests.

Razão:

Integrated automated contrast checks and keyboard focus tests directly into the build pipeline.

Trade-off:

Strictly blocks PR merges if contrast violations or missing aria attributes are detected.

Resultado:

100% of released components fully pass international accessibility standards.

05 / THE SOLUTION

A resilient design infrastructure built on Figma Tokens, Style Dictionary, Storybook, and fully typed React primitives.

  • Scalable, documented semantic token taxonomy
  • Keyboard-accessible React library with explicit focus states
  • Live documentation portal synced via GitHub Actions
Core Design System token structure and Storybook component documentation

Conceptual view of the token pipeline and component library documentation.

06 / SYSTEM & TOKENS

Governance & Developer Experience

Established clear contribution workflows, semantic versioning (SemVer), and direct support channels serving 50+ engineers and designers.

NPM package distribution with automated release changelogsCustom Figma linting plugin mapped directly to codebase tokensWeekly office hours and internal design system guild syncs
07 / OUTCOMES
01

Dramatically increased feature delivery velocity across all product teams.

02

Eliminated visual inconsistency across core web products.

03

Embedded an enduring culture of accessibility across the engineering organization.

08 / KEY LEARNINGS
  • A design system is 20% components and 80% governance, culture, and human alignment.
  • Clear semantic tokens are the ultimate bridge for unifying language between designers and developers.
  • Accessibility must be treated as a foundational architectural requirement, never an afterthought.