Is able to gain context within team's domain with help from more senior engineers.

Understands a portion of the team's domain, can gain sufficient context to work productively in that portion.

Understands their team's domain at a high level and can gather sufficient context to work productively within it. Has expertise in a portion of their team's domain.

Has expertise in their team's domain, including the breadth of services, how they interact, and data flows between systems. Understands adjacent domains as they affect their team.

Has expertise in a set of related team's domains, including the breadth of services, how they interact, and data flows between systems.

Has expertise in the organization's architecture, including all domains, their bounded contexts, and how they interact with each other.