Worked on enhancing test reliability and coverage for the govuk-one-login/ipv-core-front repository by developing a browser-based end-to-end test to verify the presence and correct timing of the Device Intelligence cookie during realistic user journeys, such as navigation and form submission. Maintained and updated tests to align with continuous integration requirements, addressing review feedback to improve reliability and maintainability. Additionally, contributed to the govuk-one-login/ipv-core-back repository by fixing a regression test gap, ensuring the Audit Events feature was properly included in Quality Gate coverage. Utilized JavaScript, TypeScript, and end-to-end testing skills to strengthen quality assurance processes.