July 2025 monthly summary focusing on business value and technical achievements. Delivered multi-port RDMA Mana driver support enabling scalable networking; ensures per-port IB device association and MAC configuration, RoCE UDP encapsulation on non-primary ports, and Ethernet AH for non-primary ports; CM support remains exclusive to port 1. This work improves throughput and deployment flexibility for multi-port RDMA environments, reducing manual configuration and enabling better hardware utilization. Overall impact: enhanced scalability and reliability in RDMA networking with minimal risk to existing configurations. Technologies and skills demonstrated: kernel/driver development, RDMA, per-port configuration, NIC/IB device management, low-level networking, change traceability via commits.

March 2025: Delivered a critical race-condition fix in the Mana provider's shadow queue within amzn/rdma-core, strengthening data integrity and cross-thread coordination in high-throughput scenarios. The change implemented release/acquire semantics and atomic indices for producer/consumer threads, reducing risk of data corruption and timing issues. This work enhances reliability, lowers incident potential, and demonstrates strong concurrency engineering and low-level systems skills.