Senior 5G Modem Engineer – OpenWrt & eSIM Lead

Ericsson; Boise (ID); On-site; USD 234,000 - 293,000; Full time

Job summary

Ericsson Enterprise Wireless Solutions is expanding its modem engineering team in North America, focused on end-to-end development of 5G cellular use cases in collaboration with global Ericsson teams and chipset partners. As a Modem Firmware Principal Engineer – Modem, you will design, develop, and optimize modem host platform software for LGA modules, taking strong technical ownership.

This role offers opportunities to influence platform architecture, lead CI/CD and automated test frameworks,

Qualifications

• 10+ years in embedded Linux, modem, or telecom development.
• 5+ years in cellular modem driver development and eSIM/eUICC integration.

Responsibilities

• Architect and own the end-to-end modem and eSIM integration stack on OpenWrt platforms.
• Design and develop Linux kernel drivers for modem interfaces (USB/PCIe/SDIO).
• Implement and optimize QMI/RMNET/AT command layers for modem control and data path.
• Architect and implement a Local Profile Assistant (LPA) for eSIM profile lifecycle management.
• Develop secure channel protocols between the platform and eUICC.
• Integrate SM-DP+ provisioning flows for remote profile download and activation.
• Implement connection management with failover and multi-SIM orchestration.
• Drive modem firmware update (FOTA) strategy and implementation.
• Lead carrier certification efforts (GCF, PTCRB) and GSMA compliance.
• Define the technical roadmap for next-generation modem and eSIM platform capabilities.
• Design CI/CD pipelines and automated test frameworks for modem and eSIM firmware.
• Build HIL test infrastructure and automated fleet provisioning workflows.
• Establish coding standards and architectural guidelines for the team.

Skills

Embedded Linux

Modem driver development

eSIM/eUICC integration

OpenWrt/LEDE

GSMA RSP specs

Cellular modem control interfaces

C/C++ for embedded

Security protocols

CI/CD tooling

Technical leadership

Education

Bachelor’s degree in Electrical Engineering, Computer Engineering, Computer Science, or Telecommunications

Tools

OpenWrt build system

CI/CD tooling (Jenkins, GitLab CI, GitHub Actions)

Job description

Ericsson Enterprise Wireless Solutions is expanding its modem engineering team in North America, focused on end-to-end development of 5G cellular use cases in collaboration with global Ericsson teams and chipset partners. As a Modem Firmware Principal Engineer – Modem, you will design, develop, and optimize modem host platform software for LGA modules, taking strong technical ownership.

This role offers opportunities to influence platform architecture, lead CI/CD and automated test frameworks,