Victor Diaz contributed backend features to the spinnaker/spinnaker and jdx/mise repositories, focusing on security and tooling improvements. For Spinnaker, he enhanced webhook logging by implementing sensitive header masking, ensuring credentials are hidden in logs while remaining functional in HTTP requests. This involved updating header merging logic, extending configuration models, and adding comprehensive tests using Java and the Spring Framework. In the jdx/mise repository, Victor integrated the QSV CLI tool into the registry and CI workflow, configuring TOML-based backends and tests to support maintainable plugin management. His work demonstrated depth in API development, DevOps, and backend engineering practices.