The document provides information on core responsibilities and performance expectations for different levels of software engineering roles at LinkedIn. It outlines expectations around leadership, execution, and technical skills. For leadership, expectations progress from role modeling good behaviors to leading discussions and mentoring others. For execution, responsibilities scale from understanding team goals to collaborating across teams. And technical skills expected increase in complexity from building to requirements to defining technical strategies that impact the organization. The document is intended to help employees and managers identify areas for development and coaching to achieve career goals.