Job Description
About this opportunity:
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.
Ericsson Enterprise Wireless Solutions is expanding its modem engineering team in North America focused on end-to-end development of advanced 5G cellular use cases in collaboration with global Ericsson teams and leading chipset partners. This core team is driving the development of next-generation enterprise and industrial 5G solutions on advanced cellular chipset platforms.
We are looking for an experienced Principal Modem Engineer to lead the architecture development and integration of cellular modem drivers and eSIM/eUICC provisioning stacks on OpenWrt-based platforms. In this role you will own the full modem connectivity stack - from kernel-level USB/PCIe drivers through QMI/RMNET interfaces to eSIM profile lifecycle management. You will drive technical strategy support the growth of engineering teams and establish best practices for carrier-grade modem and eSIM deployments across 5G product lines. This is a full-time position based in the USA.
What you will do:
As a Modem Firmware Principal Engineer - Modem you will design develop and optimize modem host platform software for LGA modules. This role offers a unique opportunity to influence platform architecture early take strong technical ownership and deliver high-performance power-efficient 5G modem solutions at global scale.
- 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 (SCP03 SCP80/81) between the platform and eUICC
- Integrate SM-DP+ provisioning flows for remote profile download and activation
- Implement connection management with failover reconnection and multi-SIM orchestration
- Drive modem firmware update (FOTA) strategy and implementation
- Lead carrier certification efforts (GCF PTCRB) and GSMA compliance (SAS-UP SAS-SM)
- Define the technical roadmap for next-generation modem and eSIM platform capabilities
- Design and implement CI/CD pipelines and automated test frameworks for modem and eSIM firmware
- Build hardware-in-the-loop (HIL) test infrastructure and automated fleet provisioning workflows
- Establish coding standards review processes and architectural guidelines for the team
- Support and develop senior and mid-level engineers on modem driver and eSIM development
- Collaborate with mobile network operators eUICC vendors and chipset vendors for interoperability
The skills you bring
- 10+ years in embedded Linux modem or telecom development; 5+ years in cellular modem driver development
- 3+ years each with eSIM/eUICC integration (GSMA RSP) OpenWrt or similar embedded Linux and technical leadership
- Linux kernel modem driver development (USB PCIe qmi_wwan mhi)
- OpenWrt/LEDE build system package development and platform customization
- eSIM/eUICC architecture and GSMA RSP specifications (SGP.02 SGP.22 SGP.32)
- Cellular modem control interfaces (QMI RMNET AT commands NCM)
- Secure element communication (ISO 7816 APDU SCP03)
- Proficiency in C/C++ for embedded Linux and real-time systems
- Network stack expertise (iptables/nftables iproute2 netifd routing NAT)
- PKI infrastructure certificate management and secure provisioning
- Bachelor's degree in Electrical Engineering Computer Engineering Computer Science or Telecommunications (Master's or Ph.D. preferred)
- Experience with Qualcomm SDX-series modem platforms eUICC vendors and CI/CD tooling (Jenkins GitLab CI GitHub Actions) is a plus
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 [email protected].
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) || Santa Clara (Country/ City)
Job details: Developer
Compensation and Benefits at Ericsson
At Ericsson we know that our people are the key to our success. We offer a competitive package to help with your individual needs and goals.
Your Pay
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.
The salary range for this position is
Santa Clara CA : $232000-292500
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.
Your Health
Ericsson Enterprise Wireless Solutions offers excellent competitive employee benefits such as: subsidized nationwide PPO medical benefit options including a low-deductible Point of Service Plan and a qualifying High Deductible Health Plan (HDHP) with a generous company-provided HSA contribution. For California employees we offer a subsidized HMO option through Kaiser. Ericsson Enterprise Wireless Solutions also offers subsidized dental and vision coverage.
Your Financial Security
We invest in both your short and long-term financial wellbeing. Our 401(k) plan has a 4% company match and immediate vesting. Employees will also receive company-paid employee basic life and AD&D insurance and company-paid disability benefits.
Your Time
Your work-life balance is important to us. New employees are provided a minimum of 15 days of accrued vacation up to 3 personal days per year 11 annual holidays 8 hours of volunteer time and 80 hours of sick time annually. Please note paid time off is pro-rated based on the employee's start date. Furthermore Ericsson provides up to 16 weeks of paid maternity leave and 6 weeks of parental or adoption leave at 100% of pay.
Additional Benefits
Ericsson Enterprise Wireless Solutions offers other company-paid benefits such as a comprehensive Employee Assistance Program mobile therapy and volunteer paid time off.
Skills Required
- 10+ years in embedded Linux modem or telecom development
- 5+ years in cellular modem driver development
- 3+ years with eSIM/eUICC integration
- 3+ years with OpenWrt or similar embedded Linux
- Linux kernel modem driver development
- Proficiency in C/C++ for embedded Linux
- Bachelor's degree in Electrical Engineering or related field
What the Team is Saying
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Ericsson Compensation & Benefits Highlights
- Retirement Support—The U.S. 401(k) includes an automatic 3% company contribution plus matching (100% of the first 3% and 50% of the next 2%) with immediate vesting. An employee stock purchase plan and legacy pensions in some groups strengthen long‑term savings.
- Leave & Time Off Breadth—Generous PTO paid holidays sick time bereavement leave and a dedicated volunteer day are offered. Time‑off allotments can increase with tenure and are complemented by hybrid work where roles allow.
- Healthcare Strength—Medical dental vision and mental‑health support are part of a comprehensive health and wellbeing offering. Wellness initiatives such as onsite gyms fitness classes and EAP access are available in certain locations.
Ericsson Insights
What We Do
Ericsson builds the digital connectivity the world relies on. Our technology underpins the mobile networks platforms and systems that billions of people businesses and societies depend on every day. We are a global leader in communications technology delivering mobile network infrastructure cloud software and wireless connectivity solutions for service providers and enterprises worldwide. Our networks support connectivity across 180+ countries helping power everyday communication as well as critical digital services at global scale. Connectivity has evolved far beyond consumer mobile use. Today nearly 80% of the world’s population accesses the internet via mobile networks and Ericsson is helping shape what comes next. We are advancing 5G and 5G Advanced developing network APIs that open connectivity to the global developer ecosystem and applying automation and AI to make networks more intelligent efficient and resilient. Ericsson was the first company to launch live 5G networks on five continents and our 5G platform is now commercially live in 150+ networks across 60+ countries. We also support more than 36000 enterprise customers enabling secure high-performance connectivity for industries such as manufacturing aviation logistics utilities and public safety where reliability and performance are mission critical. Innovation is central to how we work. Ericsson has approximately 28000 employees in research and development backed by one of the strongest intellectual property portfolios in the industry with 60000+ granted patents. Our engineers researchers and technologists work across 100+ global R&D sites helping define how networks evolve and how digital infrastructure is built for the long term. As the world moves toward a mobile-first AI-powered and cloud-driven future connectivity becomes the foundation for digital transformation across every industry. Ericsson is building that foundation shaping the future of digital connectivity through technology that operates at global scale and supports real-world impact today and for what comes next.
Why Work With Us
Ericsson is a place for people who want to work on technology that powers everyday life. You’ll contribute to large-scale systems used every day tackle complex challenges in live environments and keep developing your skills and career in your own vision.
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Ericsson Offices
Hybrid Workspace
Employees engage in a combination of remote and on-site work.
Ericsson adopts a hybrid work model globally because we know balance matters. Sometimes things are better in real life. Other times we can be more productive at home. Our hybrid approach gives you the best of both worlds.
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Date Posted
05/23/2026
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