Summary

Senior Modem Firmware Engineer responsible for designing, developing, and integrating 5G cellular modem modules into OpenWrt-based router and gateway platforms. Owns the end-to-end modem stack including kernel drivers, user-space daemons, and network configuration to deliver reliable connectivity, failover, and optimal throughput. Develops and maintains USB/PCIe drivers, implements QMI/RMNET/AT command interfaces, configures routing policies, and debugs connectivity issues across RF, baseband, driver, and user-space layers. Requires 4+ years embedded Linux development, 2+ years OpenWrt or similar, and 2+ years cellular modem integration experience.