Mobile App

eyos Connect

Empowering micro merchants in Indonesia

Role: Design Systems Lead
Year: 2023
Team: 5
Platform: Web · iOS · Android

The Problem

"A 60-person product org had three competing UI libraries. Halcyon unified them into a single, accessible, themeable system without forcing a rewrite."

Constraints

01Adopt incrementally — no big-bang migration.

02Must theme to three existing brands.

03WCAG 2.2 AA across every component.

Discovery

Insight

Audited 312 button variants across 14 surfaces. Reduced to 6 canonical variants.

"I just want a dropdown that doesn't break on iOS Safari."

— Senior engineer

Guiding Principles

Tokens before components

Color, type, space — locked first.

Composable, not configurable

Small parts that snap together cleanly.

Accessibility is the default

If it ships, it passes axe.

The Solution

Outcome

−61%

Time to ship a new screen

100%

WCAG AA coverage

3 brands

Themed from one source

9 mo

To full org adoption

Reflection

The system only stuck because we paired every release with a 1:1 migration session. Documentation alone never got teams over the hump.