Definition of the Role
A full stack designer participates in every phase of the product design process, from initial concept to final implementation. This encompasses project planning, market analysis, UX design, user interface design, and sometimes coding.

Skills and Specializations
Full stack designers need a wide-ranging skill set, including user experience research, UX/UI design, and visual design. They should also be knowledgeable in areas like information architecture, interaction design and visual design.

Responsibilities
Their responsibilities include user research, prototype creation, UI design, and communicating design rationale to stakeholders. They must interpret wireframes and ensure the UI aligns with client branding while solving problems.

Challenges and Expectations
Mastering multiple design specializations makes this role challenging, akin to a doctor excelling in various fields.