What are the main tasks and challenges that a backend developer usually addresses in a project?

The backend developer is responsible for the application's logic, working with databases, integrating with external services, and ensuring security. Main tasks include:

• Designing and implementing APIs for frontend interaction.
• Working with databases: creating schemas, optimizing queries, migrations.
• Handling business logic and application rules.
• Ensuring security: authentication, authorization, vulnerability protection.
• Optimizing performance and scalability.
• Logging and monitoring server status.

Difficulties may arise in:

• Ensuring high performance under load.
• Complex data processing logic.
• Integration with various external APIs and services.
• Ensuring security and data protection.
• Managing state and data synchronization in distributed systems.