Worked on the aerospike/aerospike-client-java repository to deliver a targeted performance optimization for hex string generation. Refactored the Buffer.bytesToHexString method by replacing a manual String.format() loop with Java’s built-in HexFormat, streamlining the conversion process. This change reduced CPU cycles and memory usage on a critical serialization path, directly supporting faster client operations and improved throughput. The approach emphasized code readability and maintainability by leveraging standard library features. Focused on Java and code refactoring, the work laid groundwork for future library-style improvements while aligning with broader performance and maintainability goals across the client library, without introducing new bugs.