Worked on the honeycombio/refinery repository to deliver three features focused on reliability, security, and observability for scalable backend systems. Upgraded CI tooling and improved test reliability by replacing timing-based waits with TCP readiness polling, making integration tests more deterministic. Introduced key ID-based authorization, allowing traffic validation via ingest key IDs with live configuration reload and benchmarking for performance. Enhanced observability by adding OpenTelemetry metrics customization and granular event-level metrics for accurate usage reporting and billing. Leveraged Go for backend development, API design, and metrics tracking, demonstrating depth in DevOps practices and a security-conscious approach to authentication and deployment monitoring.