During December 2025, Kbotc focused on optimizing hex string generation within the aerospike/aerospike-client-java repository. They refactored the Buffer.bytesToHexString method, replacing a manual String.format() loop with Java’s built-in HexFormat utility. This change improved both performance and code readability, targeting a hot path in the client library where serialization speed and CPU efficiency are critical. By leveraging Java and applying code refactoring and performance optimization skills, Kbotc reduced memory churn and CPU cycles during client-side serialization. The work demonstrated a thoughtful approach to maintainability and efficiency, laying groundwork for future library improvements while addressing a key performance bottleneck.