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Modem Systems Test Engineer - Wireless Technologies and Ecosystems

Apple· Hardware
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Minato, Tokyo-toFull-timePosted 2w ago

About the role

Role focused on end-to-end test lifecycle for cellular features across LTE/5G NR and future standards, root-cause analysis of baseband software/firmware issues, translating operator specifications into test plans, and expanding test automation with AI/ML to maximize coverage and surface defects early in development.

Responsibilities

  • Test Design & System Verification: Define, develop, and execute system-level test plans evaluating 4G/5G and emerging standards across protocol control and user planes as well as physical-layer performance.
  • Carrier Acceptance & Specification Engineering: Translate complex operator specifications—with emphasis on Japanese carriers—into actionable test plans aligned with Apple’s product roadmap, executing verification across network simulators, call boxes, and lab testbeds.
  • Protocol Log Analysis & Root-Cause Triage: Analyze protocol traces, RF captures, and diagnostic logs to isolate baseband firmware and software defects, performance bottlenecks.
  • Cross-Functional Driving & Issue Resolution: Partner closely with Baseband Software, Firmware, Systems Engineering, RF, Carrier Engineering, and Regulatory teams to reproduce issues, verify fixes, and drive 3GPP and carrier conformance.
  • Test Automation, Tooling & AI/ML: Leverage AI/ML to develop custom tooling/dashboards/automation frameworks

Qualifications

  • Bachelor’s degree (BS) in Electrical Engineering, Computer Engineering, Telecommunications, Computer Science, or a related field.
  • Quick learner, strong sense of ownership to deliver results, and proactive contributor
  • Hands-on experience in cellular modem/wireless system testing, interoperability testing, protocol validation, or carrier acceptance.
  • Good knowledge of 3GPP specifications, including 4G/5G, 3GPP protocol stack, and core cellular procedures.
  • Knowledge in test automation and scripting.
  • Experience with, or strong interest in, applying AI/ML tools to test automation.

Skills

Required:Test design and system verificationCarrier acceptance & specification engineeringProtocol log analysis & root-cause triageProgramming / scriptingWireless test equipment & network emulators
Nice to have:AI/ML in testing

Benefits

  • Apple is an equal opportunity employer that is committed to inclusion and diversity, and thus we treat all applicants fairly and equally.
  • Apple is committed to working with and providing reasonable accommodation to applicants with physical and mental disabilities.
  • Accessibility focus reflected in culture, benefits and tools.
Last updated Oct 9, 2026. Interested? Apply on the company site.

About Apple

Discover the innovative world of Apple and shop everything iPhone, iPad, Apple Watch, Mac, and Apple TV, plus explore accessories, entertainment, and expert device support.

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