Harry Kodden developed a deterministic SCIM event processing improvement for the SURFscz/SBS repository, focusing on backend reliability and testability. He implemented a FIFO-ordered SCIM executor by configuring it to a single worker, ensuring consistent processing of collaboration and group events. Using Python and Flask, Harry updated SCIM request timeouts to enhance reliability and reduce latency under load. He also expanded CI and testing coverage by introducing tooling that simulates I/O without requiring a live server, which improved test coverage and reduced environment dependencies. The work included minor test readability improvements, reflecting a thoughtful and methodical engineering approach within backend development.