System Test Engineer — 5G/6G Interoperability

Apple Inc.; Sunnyvale, Northern (CA, KY); Hybrid; USD 150,000 - 278,000; Full time

Job summary

Apple Inc. in Sunnyvale, CA, is seeking a System Test Engineer on our Wireless Technologies and Ecosystems team to validate 5G and emerging 6G interoperability across networks and devices.

You will design system-level test strategies, collaborate with silicon, software, and RF teams, and build AI-assisted tooling to accelerate test coverage and uncover issues early. You will drive quality with rigorous testing and align with 3GPP roadmaps, delivering world-class wireless experiences to Apple

Qualifications

• Master's degree in Electrical Engineering, Computer Engineering, Telecommunications, or a related field.
• 3+ years of hands-on experience in wireless system testing, interoperability testing, or protocol validation.
• Deep knowledge of 3GPP standards including 5G NR physical layer (FR1 and FR2/mmWave), RRC, NAS, and related protocols
• Proficiency in scripting and automation (Python, shell, or similar) for test development and result analysis
• Experience with AI/ML tools for test data analysis, anomaly detection, or tool development
• Familiarity with lab test equipment such as network emulators, protocol analyzers, and signal analyzers

Responsibilities

• Design, develop, and execute system-level interoperability test plans for 5G NR (Sub-6 and FR2/mmWave) and emerging 6G technologies across commercial and lab network environments
• Analyze 3GPP protocol stacks and physical layer behavior to identify failure modes and drive root cause analysis on complex wireless issues
• Build and maintain automated test frameworks and AI/ML-assisted diagnostic tools to accelerate test coverage and reduce manual effort
• Partner with carrier and chipset partners to define interoperability test scenarios and reproduce field-reported issues in a controlled lab setting
• Collaborate with hardware, software, and RF teams to validate new device features against evolving 3GPP specifications
• Triage, document, and track defects with clear technical detail, working closely with engineering teams to drive issues to resolution
• Contribute to the development of internal test infrastructure, signal analysis pipelines, and reporting dashboards
• Stay current with 3GPP Release roadmaps and proactively identify testing gaps as standards evolve

Skills

Interoperability testing

3GPP knowledge

Automation scripting

AI/ML tooling

Cross-functional collaboration

Education

Master's degree in Electrical Engineering, Computer Engineering, Telecommunications, or a related field

Tools

Network emulators

Protocol analyzers

Signal analyzers

Job description

Apple Inc. in Sunnyvale, CA, is seeking a System Test Engineer on our Wireless Technologies and Ecosystems team to validate 5G and emerging 6G interoperability across networks and devices.

You will design system-level test strategies, collaborate with silicon, software, and RF teams, and build AI-assisted tooling to accelerate test coverage and uncover issues early. You will drive quality with rigorous testing and align with 3GPP roadmaps, delivering world-class wireless experiences to Apple