Can you tell about the key principles of server system development?

Key principles of server system development include:

• Reliability and fault tolerance: the system should continue to operate even when individual components fail.
• Scalability: the ability to increase performance and capacity as load grows.
• Security: data protection and access control.
• Performance: optimizing response time and request processing.
• Maintainability and extensibility: code should be understandable, modular, and easy to update.
• Logging and monitoring: for tracking system status and quickly responding to issues.

For example, when developing a REST API, it is important to ensure proper error handling, user authentication, and the ability to horizontally scale the server.