How Siemens Unified 8 Feature Teams Under One Angular Design System

Siemens runs one of the most complex engineering ecosystems in the world. Within a single enterprise project, 8 separate feature teams were building frontend interfaces in Angular - each with their own component patterns, design conventions, and testing standards.

The result was predictable. Buttons looked different across modules. Form inputs behaved inconsistently. Every team spent hours rebuilding components that already existed two repositories over. Onboarding new developers meant learning not one codebase, but eight micro-cultures of frontend engineering.

For Siemens, this wasn't a cosmetic problem. Inconsistency slowed releases. Duplicate work burned senior engineering time. And the lack of a shared design language made it harder to maintain the level of quality their enterprise users expected.

Siemens needed a single, authoritative UI library - one that every team would actually use. That meant more than clean code. It required excellent documentation, practical working examples, an appealing developer experience, and test coverage rigorous enough to earn trust from teams who had been building their own components for years.

Siemens evaluated several partners for this initiative. The requirements were specific: deep Angular expertise, experience building enterprise-grade design systems, and the ability to embed directly into cross-functional teams without disrupting existing workflows.

easy.bi stood out for three reasons. First, the team had hands-on Storybook and Figma integration experience - not just Angular skills, but design system thinking. Second, easy.bi's delivery cadence (working software every 14 days) meant Siemens could evaluate real components within weeks, not months. Third, the team's approach to documentation - treating it as a first-class deliverable, not an afterthought - matched Siemens' internal quality expectations.

The easy.bi team embedded directly alongside Siemens engineers. Rather than building the library in isolation and handing it over, every component was co-designed with the feature teams who would use it daily.

Angular components with Storybook documentation. Each component was developed in Angular with a comprehensive Storybook story - showing every state, variant, and edge case. Developers could browse the library, see a component in action, copy the usage code, and integrate it in minutes. No guessing, no Slack messages asking "how does this work?"

Figma as the single source of design truth. Designers worked in Figma; developers worked in code. The library bridged both worlds. Every Angular component mapped directly to a Figma component, ensuring that what designers drew and what developers shipped were always in sync.

Test coverage as a trust signal. Adoption only works when teams trust the library won't break their features. easy.bi maintained 100% test coverage across every component - unit tests, integration tests, and visual regression tests. When a feature team pulled in a library update, they knew it had been verified.

Project management ran through Jira and Confluence, with agile sprints enabling iterative refinement. Every 2 weeks, Siemens stakeholders reviewed new components, provided feedback, and prioritized what came next.