Senior Modem Firmware Engineer - 5G/OpenWrt

Ericsson; Boise (ID); On-site; USD 120,000 - 160,000; Full time

Benefits offered by this job

401(k) match

Health insurance

Paid time off

Job summary

Ericsson Inc. is seeking a Senior Modem Firmware Engineer to design, develop, and integrate cellular modem modules into OpenWrt-based platforms from Boise, Idaho.

You will own the end-to-end modem stack across kernel drivers, user-space daemons, and network configuration to deliver reliable connectivity and low latency in 5G networks. Qualifications include 4+ years in embedded Linux, 2+ years with OpenWrt, and experience with QMI/RMNET/AT command interfaces, USB/PCIe drivers, and C/C++ on

Qualifications

• 4+ years in embedded Linux development
• 2+ years with OpenWrt or similar distributions
• 2+ years integrating cellular modems (preferred: 5+ years)
• Linux kernel development: driver development, device tree, kernel modules
• OpenWrt/LEDE build system and package development
• Cellular modem integration: QMI, RMNET, AT commands
• USB/PCIe modem interface drivers
• C/C++ programming for embedded Linux systems

Responsibilities

• Integrate 5G modem modules into OpenWrt-based router and gateway platforms
• Develop and maintain kernel drivers for modem communication interfaces (USB, PCIe)
• Implement and optimize QMI/RMNET/AT command interfaces for modem control
• Configure network interfaces, routing policies, and failover mechanisms
• Implement connection management daemons for automatic reconnection and band selection
• Integrate SMS, GPS/GNSS, and voice functionality where applicable
• Optimize data throughput and reduce latency across modem interfaces
• Perform modem firmware updates (FOTA) and version management
• Debug connectivity issues across the full stack (RF, baseband, driver, user-space)
• Collaborate with hardware teams on antenna design validation and RF performance
• Create integration documentation and developer guides

Job description

Ericsson Inc. is seeking a Senior Modem Firmware Engineer to design, develop, and integrate cellular modem modules into OpenWrt-based platforms from Boise, Idaho.

You will own the end-to-end modem stack across kernel drivers, user-space daemons, and network configuration to deliver reliable connectivity and low latency in 5G networks. Qualifications include 4+ years in embedded Linux, 2+ years with OpenWrt, and experience with QMI/RMNET/AT command interfaces, USB/PCIe drivers, and C/C++ on