During July 2025, Ktabouguia delivered a performance-focused upgrade to the AsyncTimeout component in the square/okio repository. They replaced the existing linked-list timeout mechanism with a heap-based PriorityQueue, introducing a new PriorityQueue abstraction to improve efficiency and scalability under high concurrency. The implementation, written in Java and Kotlin, included comprehensive benchmarks to quantify performance improvements and extensive unit tests to ensure correctness and maintainability. By leveraging skills in algorithms, data structures, and performance optimization, Ktabouguia addressed resource utilization and responsiveness challenges, demonstrating depth in concurrent system design and a methodical approach to testing and validating the new timeout handling mechanism.