Worked on the grafana/prometheus repository to enhance garbage collection configurability by implementing support for the GOGC environment variable. Focused on backend development using Go, the work ensured that GOGC settings are respected even when no runtime block is present in the configuration. This involved updating configuration handling logic and validating the new behavior through comprehensive unit testing. The changes addressed deployment scenarios where predictable garbage collection tuning is required, improving resilience and flexibility across environments. The technical approach emphasized robust testing and clear configuration pathways, leveraging Go programming and unit testing skills to deliver a maintainable and reliable feature enhancement.