Field description - Developer

The Developer field represents the user who actually is performing the main work on the issue, usually of a technical nature.

Default name: Developer

Terminology variations: Responsible, Assignee.

In-Use: Optional. This field can be set to be used in the issue field configuration.

Mandatory: Optional. This field can be set as mandatory, but need not be.

Data type: A User, which can be an internal user but not a support user.

Access restrictions: (Default) Created: "Read/Write" for all internal users, and "No access" for external or support users.  Editing: "Read/Write" for all internal users,  and "No access" for external or support users.

Relationships/Dependencies: 

Affected by these settings: 

Project > Settings > Notifications:

The Developer of an issue can be set as a recipient of notifications generated by changes to the issue.

General > Settings > Issue configurations > Issue rules.

Developer can be used in issue rules, either as a criterion, or being set in the rule action.

Use cases: 

Developer tells you who do the main work on the issue. In software development, this is the actual developer.