We need to unify and support a multitude of Consumer and Employee websites and applications at Deutsche Bahn, ensuring quality goals like accessibility and brand consistency in a multi-framework environment. This includes addressing challenges such as cross-platform compatibility and efficient development processes. In our talk, we'll explore the key development and architectural decisions that must be made for the successful technical implementation of a design system. This design system is essential for maintaining a cohesive user experience and visual identity across the various platforms and interfaces of one of the largest German state-owned companies.