Joomla! development is organized in two teams; the development team and the Joomla! bug squad. Overall development is coordinated by the development coordinators. The development coordinators manage the overall aspects of the Joomla! development in it's widest sense.
The development team is a group of developers that are responsible for the development of new features. There is currently no specific devision in roles and responsibilities, there are only developers.
For an overview of the Joomla! Bug Squad (JBS), see the article called Welcome to the Bug Squad. As with all organisational sections within the project, we strive to have as little as possible structure within this team. Becomming a JBS member is easy -- just send a mail to the team coordinator. JBS has the most members within development related sub-teams and is a great way to get started contributing to Joomla! development. To organize the day to day operation we have defined the following roles: