The ask
BT needed one consistent design language across its customer-facing products, spanning mobile, web and connected devices. I joined a small cross-functional team, three designers, four developers, two PMs, to build it as the EE Loop Design System.
What we built
FoundationsColour, type, spacing
NavigationApp top/bottom bars, web header/footer
Core componentsButtons, forms, tabs, breadcrumbs, avatars, list tiles
ThemingFull light and dark mode across every component
DocumentationDocumented in Storybook with usage guidance, plus GIF-based guidance content for teams adopting it
From the library
Scale
400+
Designers and engineers using the system
Platforms
Across mobile, web and connected devices
9
Team (3 designers, 4 engineering, 2 product)
The takeaway
The system shipped, and it’s still in use today, across BT’s customer-facing products.