Worked on the open-telemetry/opentelemetry-collector-contrib repository to address memory management challenges in high-cardinality metric scenarios. Developed a memory leak fix for the MetricsTranslator component of the Datadog receiver by introducing a tunable, opt-in pruning mechanism. This solution added a new series_idle_timeout configuration and a background sweeper that periodically prunes stale metric series, reducing memory pressure and mitigating out-of-memory risks in production environments. The implementation, written in Go and focused on backend development, maintained backward compatibility by defaulting to opt-in behavior. Documentation was updated to guide users on configuration and usage, ensuring clarity and ease of adoption for operators.