Senior Software Engineer (5G)

CyberCoders; Germantown (MD); On-site; USD 140,000 - 190,000; Full time

Benefits offered by this job

Medical

Dental

Vision

PTO

401k w/ match

RSUs potential

Job summary

CyberCoders is seeking a Senior Software Engineer (5G) to design, develop, and optimize software for 5G modems and related subsystems. You will implement C++ components, build HAL APIs, and collaborate with RF, firmware, and systems teams to deliver robust solutions.

The role emphasizes real-time, embedded workloads, performance tuning, and standards compliance (3GPP/GSMA). You will mentor junior engineers and contribute to architectural decisions for device and network components.

Qualifications

• 5+ years of professional software engineering experience with C++.
• Direct experience with 5G modem software and protocol stacks.
• Strong understanding of cellular technologies (5G/LTE) and 3GPP specs.
• Experience with embedded systems and real-time constraints.

Responsibilities

• Design, implement and maintain C++ software for 5G modem components.
• Develop HALs and stable APIs for modem integration.
• Optimize performance for real-time embedded targets.
• Integrate and test modem software with SDKs and hardware.
• Collaborate with RF, firmware, QA to define interfaces.
• Drive compliance with 3GPP/GSMA standards.
• Participate in design reviews and code reviews.
• Mentor junior engineers and guide technical planning.
• Support feature delivery for device and network components.

Skills

C++ development

Embedded systems

5G modem

Protocol stacks

RAN experience

SDKs debugging

Multi-threading

Mentoring

Education

Bachelors or Masters in CS/EE

Tools

SDKs

Debugging tools

Profiling tools

Job description

Senior Software Engineer (5G)

Company Overview

We are located in San Diego, CA and we are a publicly traded communications company that has proudly been in business for over 20 years! We are on a mission to provide the highest quality service possible and bridging the digital divide across the globe. We work across a variety of different industries and we are one of the global leaders in our space that is constantly innovating and working with the latest technologies.

Position Overview

We are seeking a Senior Software Engineer (5G) to design, develop and optimize software for 5G modems and related subsystems. The role focuses on C++ implementation of protocol stack components and modem features, building robust abstractions (HAL/APIs), and ensuring performance and standards compliance (3GPP/GSMA). You will collaborate with RF, firmware, and systems teams to deliver 5G device and network solutions, drive technical decisions, and mentor junior engineers.

Key Responsibilities

• Design, implement and maintain C++ software for 5G modem components and protocol stack elements (NAS, SDAP, RRC, PDCP, RLC, MAC, PHY).
• Develop and maintain software abstraction layers (HAL) and clear, stable APIs for modem and device integration.
• Optimize performance and resource usage for real-time and embedded targets, including profiling, memory and CPU optimization.
• Integrate and test modem software with SDKs, hardware platforms and target devices; perform bring-up and debugging on lab hardware.
• Work closely with cross-functional teams (RF, firmware, system integration, QA) to define interfaces and ensure end-to-end functionality.
• Drive compliance with 3GPP and GSMA standards, interpret specifications and translate requirements into engineering tasks.
• Participate in design reviews, code reviews, and set best practices for maintainable, testable code.
• Troubleshoot complex issues across software and hardware boundaries using logs, tracing, and diagnostics tools.
• Mentor and guide junior engineers, contribute to technical planning, and influence product and architecture decisions.
• Support feature delivery for both device (5G modem, 5G devices) and network-side components (RAN, gNodeB / base station) as required.

Qualifications

• Bachelors or Masters degree in Computer Science, Electrical Engineering or related field.
• 5+ years of professional software engineering experience, with demonstrable experience in C++ development.
• Direct experience with 5G modem software and protocol stacks (required).
• Strong understanding of cellular technologies (5G and LTE) and 3GPP specifications; familiarity with GSMA guidelines.
• Proven experience with modem-related layers: NAS, SDAP, RRC, PDCP, RLC, MAC and PHY.
• Experience with embedded systems, real-time constraints, and device bring-up (nice to have).
• Experience with RAN components, gNodeB / base station software, or integration with network elements (nice to have).
• Experience building HALs, software abstractions, and stable APIs for hardware integration (nice to have).
• Familiarity with SDKs, modem stacks, drivers and debugging tools; experience with multi-threading, synchronization and performance tuning.
• Excellent problem-solving, communication and collaboration skills; experience mentoring junior engineers.

Benefits

• Medical
• Dental
• Vision
• PTO
• 401k w/ match
• Potential for RSUs