Sr Modem Firmware Engineer

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 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.    About this opportunity  Join Ericsson as a Senior Modem Firmware Engineer based in the USA, where you will design, develop, and integrate cellular modem modules into OpenWrt-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 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    The skills you bring  4+ years in embedded Linux development; 2+ years with OpenWrt or similar distributions  2+ years integrating cellular modems (preferred: 5+ years across multiple chipset vendors)  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  Cross-compilation toolchains and embedded build systems  Bachelor’s degree in Electrical Engineering, Computer Engineering, Computer Science, or related field (Master’s preferred)  Nice to have: experience with Qualcomm SDX-series modules, Quectel/Telit modules, ModemManager, VPN integration (WireGuard, OpenVPN, IPsec), eSIM/eUICC provisioning, or multi-WAN failover (mwan3)  Why join Ericsson? 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.   What happens once you apply? Click Here  to find all you need to know about what our typical hiring process looks like.   Ericsson uses a merit-based hiring approach that values people with different experiences, perspectives and skillsets. We truly believe this approach drives innovation, which is essential for our future growth. We encourage people from all backgrounds to apply and realize their full potential as part of our Ericsson team.  Ericsson is proud to be an Equal Opportunity employer,  learn more.   If you need assistance or to request an accommodation due to a disability, please contact Ericsson at hr.direct.americas@ericsson.com.    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 (ID) (Country/ City)   Job details: Developer   Compensation and Benefits at Ericsson At Ericsson, we know that our