Andrej contributed to the grafana/alloy and grafana/loki repositories, focusing on backend development and configuration management. In grafana/alloy, he enhanced secret detection by upgrading the gitleaks configuration to v8.26.0, refining regular expressions and expanding allowlists in TOML to improve detection accuracy and reduce false positives. For grafana/loki, he implemented an L2 chunks cache using Memcached, updating Helm and Kubernetes configurations to support scalable, high-performance caching for large deployments. His work demonstrated depth in Go, YAML, and caching strategies, addressing both security and performance challenges through targeted, maintainable changes that improved reliability and reduced operational risk.