During June 2025, Sawa enhanced billing data handling for the neondatabase/autoscaling and neondatabase/neon repositories by standardizing event storage using NDJSON and gzip compression. Sawa transitioned billing event reporting from JSON arrays to newline-delimited JSON, enabling more efficient downstream processing and analytics. The work included refining S3 key strategies, shifting data partitioning from daily to hourly to support regional storage and granular analytics, and correcting key format inconsistencies. Leveraging Go and Python, Sawa applied skills in backend development, cloud storage integration, and data serialization to deliver scalable, maintainable solutions that improved storage efficiency and enabled finer-grained business insights.