Anirban Nandi enhanced rate limiting in the docker/envoy repository by developing support for inline rate limit descriptors within the Envoy HTTP rate limit filter. This feature allows rate limit descriptors to be defined directly in the filter configuration, enabling per-filter overrides of route-level settings and providing more granular traffic control. Anirban’s work involved modifying C++ and Protobuf code to introduce a new rate_limits field, ensuring that filter-level policies could be tested and deployed independently. By leveraging skills in Envoy, HTTP filters, and gRPC, Anirban improved the flexibility and maintainability of rate limiting across distributed service architectures.