Worked on the PolyhedraZK/Expander repository to deliver a feature that improved cryptographic data retrieval reliability for backend systems. By updating the base URLs used to fetch Keccak and Poseidon circuits and witnesses, the developer eliminated reliance on an unstable endpoint, reducing fetch failures and minimizing interruptions in downstream pipelines. The approach focused on secure URL-based resource management and ensured traceability through a dedicated commit. Utilizing Rust for backend development, the work enhanced pipeline stability and accelerated test and deployment cycles. This contribution demonstrated attention to secure handling of cryptographic assets and a methodical approach to infrastructure reliability within the project.