On small, agile teams this role is often shared among several team members that also perform other roles. See Guideline: Self Organize Work Assignments and Guideline: Staffing a Project for more information on this approach.
Even in the smallest team, multiple individuals should be working together to create the technical solution.
A person performing this role can have specialized skills in a particular technical area, but should also have a broad
understanding of all the technologies involved to be able to work with other technical team members.
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