During his recent work, Diego enhanced the grafana/plugin-ci-workflows repository by enabling secure CI support for private Go modules, addressing the challenge of authenticating dependency downloads in continuous integration. He implemented a GitHub App token flow and configured Git to use this token, allowing reliable builds with private dependencies using Go Modules and GitHub Actions. Later, in the grafana/grafana repository, Diego added support for PostgreSQL JSON and JSONB data types in the PGX driver, resolving data mapping issues and expanding integration tests. His contributions focused on backend development, CI/CD, and testing, demonstrating depth in workflow automation and data integration.