Sr Modem Firmware Engineer

Grow with us

Ericsson Inc. does not sponsor U.S work authorizations for this job position including U.S. immigration filings for initial and/or change of employer paperwork for H-1’s, H-1B1’s, E-3’s, O-1’s, and TN’s. Ericsson also does not hire F-1’s working on CPT or EAD for this position.

Join Ericsson as a Senior Modem Firmware Engineer based in the USA, where you will design, develop, and integrate cellular modem modules into Open Wrt-based platforms. You will own the end-to-end modem stack — spanning kernel drivers, user-space daemons, and network configuration — to deliver reliable connectivity, seamless failover, and optimal throughput across 5G cellular networks.

• Integrate 5G modem modules into Open Wrt-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

• 4+ years in embedded Linux development; 2+ years with Open Wrt or similar distributions
• 2+ years integrating cellular modems (preferred: 5+ years across multiple chipset vendors)
• Linux kernel development: driver development, device tree, kernel modules
• Open Wrt/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
• Cross-compilation tool chains and embedded build systems
• Bachelor’s degree in Electrical Engineering, Computer Engineering, Computer Science, or related field (Master’s preferred)

• Experience with Qualcomm SDX-series modules, Quectel/Telit modules, Modem Manager, VPN integration (Wire Guard, OpenVPN, IPsec), eSIM/eUICC provisioning, or multi-WAN failover (mwan3)

At Ericsson, you’ll have an outstanding opportunity. The chance to use your skills and imagination to push the boundaries of what’s possible. To build solutions never seen before to some of the world’s toughest problems. You’ll be challenged, but you won’t be alone. You’ll be joining a team of diverse innovators, all driven to go beyond the status quo to craft what comes next.

Ericsson is proud to be an Equal Opportunity employer. We encourage people from all backgrounds to apply and realize their full potential as part of our Ericsson team.

If you need assistance or to request an accommodation due to a disability, please contact Ericsson at hr

DISCLAIMER:
The above statements are intended to describe the general nature and level of work being performed by employees in this position. They are not an exhaustive list of all responsibilities, duties and skills required for this position, and you may be required to perform additional job tasks as assigned.

Primary country and city:
United States (US) || Boise () (Country/ City)

Job details:
Developer

The salary range for this position is dependent on various factors including, but not limited to, location, and the candidate’s combination of job-related knowledge, qualifications, skills, education, training, and experience.

Short‑Term Variable Compensation Plan:
Your pay also includes the opportunity for an annual bonus. Actual bonus payouts are based on performance of the business against the unit’s objectives, individual performance, and the individual bonus target. Certain eligibility and pro‑ration rules apply.

Ericsson Enterprise Wireless Solutions offers excellent, competitive employee benefits, such as: subsidized, nationwide PPO medical benefit options including a low‑deductible Point of…