In March 2025, Bala Natarajan developed throughput bucketing for Azure Cosmos DB within the kazrael2119/azure-sdk-for-js repository. This feature introduced per-request thresholds, enabling finer-grained throttling and improved resource utilization for client applications experiencing variable workloads. Bala applied expertise in API design, SDK development, and testing, using JavaScript and TypeScript to ensure seamless integration and maintainability. The technical approach allowed developers to assign requests to specific throughput buckets, resulting in more predictable performance and better cost management. The work demonstrated a focused, in-depth engineering effort, addressing a nuanced performance challenge without introducing bug fixes during the development period.