How is the division of responsibilities and tasks among team members of developers carried out?

Responsibility division within a development team is usually based on principles of modularity and specialization. Each team member is responsible for a specific module or functionality, which helps avoid duplication and conflicts.

For example, in a Java project, one developer might handle the data layer (DAO, repositories), another the business logic (services), and a third the user interface (frontend or API controllers). Roles are also often distinguished by specialization: backend developer, frontend developer, tester.

To coordinate tasks, project management systems (Jira, Trello) are used, where tasks are assigned to developers considering their competencies and workload. It is important that each understands their area of responsibility and interacts with others through clearly defined interfaces and contracts.