Oussama Teffahi enhanced cross-language entity identification in the eclipse-zenoh/zenoh-java and eclipse-zenoh/zenoh-kotlin repositories by introducing EntityGlobalId support, enabling precise differentiation of repliers within the same Zenoh peer. He updated data structures and JNI callbacks in both Java and Kotlin codebases, ensuring accurate propagation of the new identifier type through the system. Oussama also synchronized dependency lockfiles using Cargo to maintain consistent builds across multi-language repositories, addressing reliability in continuous integration workflows. His work demonstrated depth in API design, dependency management, and system programming, resulting in more robust, predictable integrations and improved query response accuracy across Zenoh’s distributed environment.