Can implement styles from an existing design system to make a new page.
Can contribute basic new components and styles to a design system.
Can create a simple design system by themselves, and can contribute complex, multi-variable components to existing systems
Can independently create and maintain a design system of moderate complexity which is easily scalable and has a 1 to 1 relationship with a code base.
Can independently create and maintain a large design system, document it, and publish it publicly. Is known in the industry as an expert on design systems.