I found an article that has answered a lot of terms that have been floating around me since I have adopted Drupal as my new career.  It has clarified a great many things that I only had passing understanding and I wish to share it here.

The roles it clarifies are:

• Drupal Site Builder
• Drupal Themer
• Drupal Backend Developer
• Drupal Architect
• Drupal DevOps/Sysadmin Engineer
• Drupal QA Engineer
• Drupal Project Manager/Scrum Master
• Drupal Designer
• Drupal Product Owner
• Content Marketer

and the article gives an overview of each role.

you can read it here:   https://opensenselabs.com/blogs/articles/drupal-development-roles