Worked on backend enhancements for prebid-server-java and PubMatic-OpenWrap/prebid-server, focusing on API integration and data serialization using Java and Go. Delivered improvements to IxBidder’s PAAPI configuration handling by refactoring parsing logic, updating auction configuration extraction, and introducing a new model for auction config extensions. Enhanced maintainability by clarifying data models and mapping logic. In a separate feature, improved diagnostics in the Index Exchange adapter by switching IxDiag data handling to json.RawMessage and implementing a map-based approach for collecting diagnostic fields, preserving existing data while appending new version information. Prioritized reliability, observability, and maintainable backend code throughout both projects.