Josh Humphries developed and unified a cross-module validation layer for the UKHSA-Internal/data-dashboard-api repository, centralizing data transfer models and exposing a shared MetricsAPIInterface to improve maintainability and data quality. He upgraded the ingestion service to Python 3.12, leveraging new language features and enhancing security. His work included reorganizing enums, tests, and documentation, as well as adding comprehensive validation tests and type hints to data models. In the UKHSA-Internal/data-dashboard-infra repository, Josh updated Terraform configuration to streamline access control. His contributions demonstrated depth in backend development, infrastructure as code, and Python, resulting in more robust and maintainable systems.