During May 2025, this developer delivered a Document Codes Management Utility for the hmrc/customs-declare-exports-frontend repository, focusing on backend development and configuration management using Scala. They implemented JsonUpdater.scala to centralize the process of adding and deleting document codes, including those requiring justification, and ensured updates are written back to JSON files in a sorted, deterministic order. This approach improved data integrity and streamlined maintenance, reducing the need for manual edits and simplifying audits. The work was aligned with release 4.6.3.1, with traceable commits, and positioned the module for easier future expansion of document code rules.