Contributed to the scylladb/scylla-cluster-tests repository by delivering features and fixes that enhanced test infrastructure, security, and configurability. Developed Groovy-based pipeline parameter grouping to improve CI pipeline usability and maintainability. Integrated Azure Key Vault and Google Cloud KMS for encryption at rest, enabling automated key rotation and strengthening data security in both Azure and GCP environments using Python and infrastructure as code practices. Improved test reliability by removing sudo dependencies in cloud-init version checks, reducing DNS-related failures. Added configurable replication factor validation, allowing granular control over test scenarios. Demonstrated skills in DevOps, cloud integration, configuration management, and system testing.