Jeremie Frei contributed to the CHORUS-TRE/chorus-tre repository by delivering targeted DevOps enhancements focused on CI/CD reliability and security. He stabilized Go runtimes across test containers, reducing flakiness and ensuring consistent test execution, and incremented Helm chart versions to support non-breaking updates in Argo CI workflows. In a separate feature, Jeremie implemented a configurable umask for object permissions in the JuiceFS S3 Gateway, enabling fine-grained access control and supporting compliance requirements. His work leveraged YAML, Helm, and Kubernetes, demonstrating a practical approach to infrastructure stability and security through well-scoped, low-risk changes that aligned with existing architecture.