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Cellular Protocol Development Engineer

Job in San Diego, San Diego County, California, 92189, USA
Listing for: Apple Inc.
Full Time position
Listed on 2026-02-16
Job specializations:
  • Software Development
    Software Engineer, C++ Developer
Salary/Wage Range or Industry Benchmark: 139500 - 258100 USD Yearly USD 139500.00 258100.00 YEAR
Job Description & How to Apply Below

San Diego, California, United States Software and Services

Join the Wireless Technologies and Ecosystems (WTE) organization and be part of an outstanding team of engineers, working with multi-functional teams to drive innovation and develop products used by millions worldwide. We are looking for a highly reciprocal individual who can excel in a high-paced environment. Be ready to make something extraordinary when you come here. Dynamic, encouraging people and innovative, industry-defining technologies are the norm  people who work here have reinvented and defined entire industries with our products and services.

The same real passion for innovation also applies to our business practices - strengthening our dedication to leave the world better than we found it. You should join Apple if you want to help deliver the next amazing Apple product.

Description

Apple’s Cellular Software team is seeking versatile, highly motivated and focused engineers to work across layers on groundbreaking cellular technologies. The position involves identifying and/or developing core cellular technologies that solves everyday problems for customers using iPhone, iPad, Watch and other wireless product lines. We are passionate about keeping our users connected 24/7 wherever they go. This team takes pride in not just coming up with proven software invent but also in disrupting traditional models of the cellular ecosystem.

We do whatever it takes to bring user experience to the next level.

Our members enjoy the flexibility to work on all aspects of Cellular Protocol software - SIM, NAS, AS and iOS interfaces, to come up with the best possible solution for any given problem. Are you equally passionate about cellular technologies and have the dream to work on groundbreaking cellular technologies? Then we are looking for you. As part of this team you will impact iPhone user experience worldwide.

This role requires critical expertise in multiple layers in cellular protocols, experience with UE and/or NW protocols development for various 3

GPP technologies is important.

The candidate must demonstrate tried understanding of relevant protocol procedures and network interactions.

Responsibilities
  • Responsible for the end-to-end lifecycle of critical cellular features.
  • Translate complex 3

    GPP specifications (Rel-16, Rel-17 and beyond) for 5G  4G LTE into efficient, maintainable C code.
  • Own features from architectural design through implementation, focusing on NAS (5

    GMM/5

    GSM) protocol layers.
  • Design and implement state machines and data structures.
  • Lead interactions within a multi-threaded RTOS environment.
  • Debug system-level issues on target hardware.
  • Analyze protocol logs from test teams.
  • Collaborate with multiple cross-functional teams.
  • Ensure feature stability and performance.
  • Drive features and bug fixes through integration, field testing, commercialization, and post-launch support.
Minimum Qualifications
  • Bachelors and/or Masters degree in Electrical Engineering, Computer Engineering, Computer Science or equivalent degree.
  • 2+ years of experience working with Algorithms, Data Structures, and Embedded Systems.
  • Strong coding skills in C/C++.
  • Experience with cellular protocol stacks, preferred 2G, 3G, LTE and 5G .
Preferred Qualifications
  • Pursue excellence by removing ambiguity and acting decisively.
  • Clear and concise communication skills and ability to collaborate with cross functional teams.
  • Passion for product quality and attention to detail.
  • Passionate and inquisitive, seeks to tackle problems in innovative ways.

At Apple, base pay is one part of our total compensation package and is determined within a range. This provides the opportunity to progress as you grow and develop within a role. The base pay range for this role is between $139,500 and $258,100, and your base pay will depend on your skills, qualifications, experience, and location.

Apple employees also have the opportunity to become an Apple shareholder through participation in Apple’s discretionary employee stock programs. Apple employees are eligible for discretionary restricted stock unit awards, and can purchase Apple stock at a discount if voluntarily participating in Apple’s Employee…

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