What does writing quality code mean to you?

A quality code is code that:

• Functional: Meets all requirements.
• Readable and understandable: Easily maintained and refactored by other developers (and oneself in the future).
• Extensible: Allows easy addition of new features.
• Testable: Easily covered by automated tests.
• Efficient: Uses resources effectively.
• Secure: Does not contain vulnerabilities.
• Has low technical debt: Easy to maintain and develop.

To achieve this, I follow the principles of KISS, DRY, YAGNI, SOLID, and apply design patterns. The use of linters, code formatters, and static analyzers also plays an important role.