Worked on the Zilliqa/zq2 repository to deliver a concurrency enhancement focused on optimizing read-heavy workloads. The main contribution involved refactoring the Node locking mechanism by replacing Mutex<Node> with parking_lot::RwLock<Node>, allowing for progressive upgrades from write to read locks. This approach established a foundation for future scalability and higher throughput by enabling more granular concurrency control. The work demonstrated proficiency in Rust, particularly with locking primitives and system design, and was executed as a low-risk, incremental change. No critical bugs were addressed during this period, with efforts concentrated on performance optimization and commit-level traceability throughout the process.