Over a two-month period, this developer enhanced cross-domain user data synchronization for Medianet by implementing iframe-based user sync in both the prebid/prebid-server-java and PubMatic-OpenWrap/prebid-server repositories. Leveraging YAML for configuration management, they introduced a dedicated iframe sync mechanism with configurable URL, UID macro, and CORS support, improving targeting and integration reliability. In the following month, they focused on stabilizing GDPR and privacy compliance by correcting parameter handling bugs, ensuring accurate consent data transmission and reducing compliance risk. Their work demonstrated skills in bidder integration, Java, and privacy-focused configuration, contributing to more robust and compliant advertising infrastructure.