During their work on the spiffe/spire repository, Vandry focused on backend development and telemetry improvements using Go, Prometheus, and X.509 certificates. They introduced a new metric reporting the absolute expiration time for X.509 CA rotation, enhancing monitoring compatibility and operational visibility while maintaining backward compatibility with existing TTL-based metrics. Vandry also improved the precision of uptime metrics by migrating the uptime_in_ms gauge from float32 to float64, enabling accurate long-duration uptime tracking and resolving a precision-related issue. Their contributions demonstrated careful attention to monitoring reliability, code hygiene, and integration with existing analytics workflows, reflecting a thoughtful and methodical engineering approach.