Server-side development: Writing code that runs on the server and is responsible for handling requests from client-side applications (such as web browsers or mobile apps) and generating appropriate responses.

Database management: Designing, implementing, and maintaining databases to store and retrieve data efficiently. This involves tasks like database schema design, querying, indexing, and optimization.

Security: Using security measures to protect sensitive data and prevent unauthorized access to the system. This includes measures such as encryption, authentication, and authorization.

Performance optimization: Identifying and resolving problems in the back-end system to ensure optimal speed and scalability. This may involve optimizing database queries, caching frequently accessed data, or fine-tuning server configurations.

Version control and collaboration: Working with version control systems (such as Git) to manage code changes and collaborate effectively with other developers on a team.

Testing and debugging: Writing unit tests and integration tests to ensure the reliability and stability of the back-end code, and debugging issues that arise during development or in production.

Reporting: Documenting code, APIs, and system architecture to facilitate understanding, maintenance, and collaboration among team members.