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Issued by SE² Software Engineering Excellence to Abdulrahman Kaddoura on July 16, 2026.

Certificate of Completion for Abdulrahman Kaddoura

Certificate of Completion

SOLID Excellence: Learn to write Clean and Scalable Code

Awarded to
Abdulrahman Kaddoura
Issued
July 16, 2026
Issuer
SE² Software Engineering Excellence
Certificate ID
cert-095c8e251

About this credential

The Certificate of Completion confirms that Abdulrahman Kaddoura met the requirements set for the course SOLID Excellence: Learn to write Clean and Scalable Code. Scan the QR code on the certificate or open this page to check that it is still valid.

What was learned:

  • How to apply Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion in real code.
  • Techniques to refactor legacy/spaghetti code into modular, testable components. (A skill every company needs you to have)
  • Patterns for designing extensible and maintainable software.
  • How to use dependency injection and interface-driven design to improve testability.

Skills / Knowledge

Single Responsibility Principle
Open/Closed Principle
Liskov Substitution Principle
Interface Segregation Principle
Dependency Inversion Principle
Clean Code Practices