Jacobson worked on the grafana/mimir repository, delivering a targeted refactor and dependency upgrade for Grafana Alerting. He introduced a URL-based image provider and a new HTTP client to streamline webhook configurations, while removing deprecated sender components to improve maintainability. Using Go, he focused on backend development and dependency management, updating tests to ensure regression coverage and compatibility with remote image URLs. The changes enhanced alert rendering consistency and simplified configuration flows, aligning with reliability and scalability goals. Jacobson’s work demonstrated depth in refactoring and API integration, addressing technical debt and supporting the latest Grafana alerting features without introducing bugs.