Worked on the grafana/mimir repository to refactor and generalize the tenant-fair request queue, transforming it into a reusable queue component for backend systems. Leveraging Go and concurrent programming, the work decoupled scheduler-specific logic and introduced a schedulerQueue wrapper, moving core functionality to a shared package for broader applicability. The refactor improved scalability and maintainability by enabling ingester-level concurrency and tenant-aware processing, while preserving existing behavior and performance. Software architecture principles guided the separation of concerns, updating tests and benchmarks to reflect new boundaries. This approach reduced coupling, enhanced testability, and positioned the codebase for faster, more flexible feature delivery.