Tim Jones developed and enhanced regulatory data management features across DEFRA’s epr-frontend-accountmanagement-microservice and epr-regulator-service repositories. He delivered new UI pages for managing reprocessor and exporter registrations, waste licences, and material details, using C#, Razor Pages, and JavaScript to improve navigation, session management, and data capture. Tim implemented security hardening through Content Security Policy directives and feature flagging to control UI rollouts. He also built backend service layers and integrated APIs for retrieving and displaying site materials authorizations and waste licences, employing AutoMapper and unit testing to ensure robust model mapping and data integrity throughout the regulatory workflow enhancements.