Case study

Sector AlarmOne token layer, seven platforms

Security · Design system

Led the Sector Alarm design system: one token layer serving 7 platforms simultaneously (iOS, Android, tablet, Apple Watch, Wear OS, web, desktop). Built all platforms from the same token layer rather than iOS-first to prevent a hierarchy where everything else becomes a port. CSAT: 48% to 91%. Red Dot + iF Design Award 2022.

Context

Sector Alarm is Europe's leading residential security provider. Seven platforms designed independently with their own patterns. 50% of customers reported difficulty managing security settings across devices. For a product where the core promise is peace of mind, a confusing interface is a trust problem.

Challenge

Seven platforms without a shared system, no token layer, no engineer-accessible documentation. Adoption of any new pattern required a designer on every team. Platform-sequential approach would always leave non-iOS platforms as ports.

My role

Lead designer on the system. I owned token architecture, component library, cross-platform coverage strategy, and documentation written for engineers.

What I changed

  • Built a single token layer across all 7 platforms simultaneously — not iOS-first then extend. Platform-sequential creates a hierarchy where iOS is the reference and everything else is a port. Every platform draws from the same source.
  • Colour, typography, spacing, and motion defined at the token level before any component was built. No per-platform forks.
  • Documentation deployed via ZeroHeight as implementation guidance for engineers, not design specs. If an engineer can build correctly without asking a designer, they will.

Outcome

CSAT: 48% to 91%. Task completion time: 2:10 to 55 seconds. Cross-device consistency unified across all 7 platforms. Red Dot Design Award and iF Design Award 2022.

All work