Jian-Feng worked on enhancing secret management and deployment reliability for the artsy/metaphysics and artsy/horizon repositories. He implemented a startup script in metaphysics, written in shell and bundled via Dockerfile, to load secrets centrally at application startup, improving both security and operational consistency. In horizon, he addressed a runtime issue by ensuring the load_secrets_and_run.sh script was copied from the builder stage into the runtime image and set as the ENTRYPOINT, automating secret provisioning. His work demonstrated practical DevOps and containerization skills, focusing on multi-stage Docker builds and entrypoint scripting to streamline deployments and reduce manual intervention for secret handling.