Mohamed Sahoui developed foundational features for the S3J7/Group_12_JavaProject, focusing on practical Java techniques and code maintainability. He introduced a test scaffolding class to streamline future validation and added a number parity check utility to identify even and odd values, demonstrating clear use of Core Java. Mohamed also implemented a FINRA-style output generator, printing numbers with specific substitutions to illustrate numeric transformation patterns. His work included a demonstration of swapping integers without a temporary variable and minor code documentation improvements to align with project standards. Throughout, he emphasized code clarity and maintainability, enabling faster onboarding and future feature development.