Worked on enhancing metrics observability and performance in the crowdsecurity/crowdsec repository by delivering Prometheus Metrics Cardinality Reduction. Addressed the challenge of high label cardinality in Prometheus route metrics by recording the full request path, which reduced unnecessary metric labels and improved both performance and manageability. This approach led to more reliable dashboards, lower data volume, and faster query times. The work demonstrated strong backend development and API instrumentation skills, utilizing Go and Prometheus monitoring. The solution was implemented through a targeted code change, focusing on practical improvements to monitoring infrastructure without introducing new bugs during the development period.