Axel Krastek focused on stabilizing CI-driven CA trust handling in the NHSDigital/personal-demographics-service-api repository, delivering targeted backend changes to improve test reliability and unblock development. He introduced a feature flag in Java to control CA trust behavior for example.org within CI, allowing teams to toggle between new and legacy settings as needed. Axel also enhanced healthcare worker authentication tests to handle redirects more robustly under updated CA configurations, ensuring reliable login flows. By adding an ignore flag to bypass a failing stillbirth PDS creation test, he enabled continued progress while underlying issues were addressed. His work emphasized API development and testing.