Front-End on a Team

A bare bones development team for building professional web sites or software for the web platform will typically, minimally, contain the following roles.

Visual Designer (i.e., fonts, colors, spacing, emotion, visuals concepts & themes)
UI/Interaction Designer/Information Architect (i.e., wireframes, specifying all user interactions and UI functionality, structuring information)
Back-End Developer (i.e., writes code that runs on server)

It is assumed that the team mentioned above is being directed by a project lead or some kind of product owner (i.e., stakeholder, project manager, project lead, etc.)

SEO Strategists
DevOps Engineers
Performance Engineers
API Developers
Database Administrators

NOTES:

A small trend seems to be occurring where a, “full-stack developer” takes on the responsibilities of both a front-end and back-end developer.