Embedded 5G/4G Cellular RF Software/Firmware Engineer

San Diego Sunnyvale Until 9/22/2026 10+ years exp First posted July 24, 2026 Last posted July 24, 2026
Job description

Do you have a passion for invention and self-challenge? Do you thrive on pushing the limits of what’s considered feasible. As part of a world class modem team, you’ll craft sophisticated groundbreaking embedded firmware that deliver more performance in our products than ever before. You’ll work across fields to transform improved hardware elements into a single, integrated design. Join us, and you’ll help us innovate new cellular technologies that continually outperform the previous iterations! By collaborating with other product development groups across Apple, you’ll push the industry boundaries of what wireless systems can do and improve the product experience for our customers across the world. Do you want to have an impact on every single Apple product? As a Wireless Firmware Engineer on the physical layer development team, you will be at the center of the embedded 5G/4G/multimode cellular firmware effort within a silicon design group responsible for designing and productizing state-of-the-art cellular SoCs.

Description

This position requires someone comfortable with all aspects of embedded software design and development, that thrives in a dynamic cross-functional organization, is not afraid to debate ideas openly, and is flexible enough to pivot on constantly evolving requirements.

Minimum Qualifications

BS and a minimum of 10 years relevant industry experience.
Knowledge of mobile communications in 4G/5G 3GPP protocols and physical layer & radio aspects
Solid understanding of Digital signal processing and RF fundamentals.
Solid understanding of software engineering principles, and core computer science fundamentals.
Excellent command of C and C++, and working experience with compilers, build and source code control tools.
Working knowledge of CPU architecture, HW/SW interfaces and memory management.
Proficiency with debugging in embedded software systems. Familiarity with JTAG and ETM Trace tools.
Knowledge of Communication theory, Wireless standards, Radio architecture and Interfaces

Preferred Qualifications

Previous working experience in a real time embedded product.
Previous working experience developing RFSW for a cellular Modem.
Previous working experience in MSIM RF arbitration or RF Ctrl.

About this role

Summary

Design and develop embedded firmware for 4G/5G cellular modems in a cross-functional team.

Job title

Embedded 5G/4G Cellular RF Software/Firmware Engineer

Experience level

10+ years

Minimum experience

10+ years exp

Industry

software

Location requirements

San Diego or Sunnyvale; remote work allowed

Salary

Not specified

Management role

No

Skills & keywords

Required skills

CC++embedded systemsdigital signal processingradio fundamentalsdebuggingcommunication protocols

Preferred skills

real time embeddedcellular modemRF arbitrationRF control

Specializations

embedded systemsRFcellularfirmwaresoftware development
Locations

Structured locations inferred from the posting.

San Diego, CA, USA

Remote City

Sunnyvale, CA, USA

Remote City