During October 2025, Chen Jianxing focused on enhancing the reliability of Wi-Fi transmissions in the espressif/esp32-wifi-lib repository. He addressed a critical issue in the ESP32 Wi-Fi stack by implementing a fix that forces the TX frame ACK bit, ensuring reliable MAC transmission termination across various ESP32 hardware variants. This solution, developed using embedded C and low-level bitwise operations, reduced unnecessary retransmissions and improved connectivity in production environments. Chen validated the fix across multiple devices, demonstrating a deep understanding of embedded systems and firmware development while aligning the software’s behavior closely with the underlying ESP32 hardware requirements.