Worked on reliability and performance improvements across the apache/paimon and apache/auron repositories using Java, Scala, and Spark. Addressed a configuration validation issue in Paimon’s SparkSession extensions by ensuring required Spark configurations are checked against the active SparkSession, reducing misconfiguration risk and improving production stability. Added unit tests to verify the correctness of these checks. In apache/auron, delivered a targeted performance optimization for native metrics retrieval by refactoring the API to accept specific metric keys, reducing overhead and improving scalability. Collaborated with peers and validated changes through tests and code reviews, focusing on robust, maintainable solutions to core workflow challenges.