What are the roles and responsibilities of a Software Development Engineer 3?

A Software Development Engineer 3 (SDE3) is a senior-level software engineer responsible for designing, developing, and maintaining complex software systems. They often lead technical initiatives, mentor junior engineers, and contribute to architectural decisions. SDE3s are expected to have deep expertise in their technology stack, strong problem-solving skills, and the ability to drive projects from conception to deployment. They collaborate with cross-functional teams to deliver high-quality software solutions and may also participate in code reviews and technical interviews.