Worked on enhancing the reliability of the membrane/api-gateway by addressing HTTP semantics in backend request handling. Focused on the IdempotencyInterceptor, the developer corrected the status code returned for duplicate requests, changing it from 400 (Bad Request) to 409 (Conflict) to better align with standard HTTP practices. This adjustment improved the gateway’s idempotent behavior, ensuring clients receive accurate feedback in duplicate-request scenarios and reducing confusion from erroneous error codes. The work involved backend development and testing, utilizing Java and API Gateway technologies. The targeted bug fix was delivered as a single, traceable commit, reflecting a precise and standards-driven engineering approach.