Worked on the Planning-Inspectorate/back-office repository to enhance security and reliability within the end-to-end testing infrastructure. Addressed two critical bugs by updating the dotenv dependency to version 17.2.0, mitigating potential security vulnerabilities, and refactored the Cypress configuration and test assertions to reduce test fragility. Focused on JavaScript and Cypress for dependency management and test stabilization, ensuring changes were isolated to configuration and test code to minimize deployment risk. These improvements led to fewer flaky tests, faster feedback cycles, and better alignment of test data across environments, ultimately supporting smoother continuous integration and higher quality software releases.