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Cellular Performance Engineer

Apple· Software and Services
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Hybrid (Sunnyvale, California)$150.4k - $277.6kFull-timePosted 3d ago

About the role

In the Wireless Technologies group, responsible for bringing cellular and satellite connectivity to Apple products. Design, develop, and patent next-generation wireless technologies, build cellular performance labs, and drive end-user experience through data-driven performance characterization across labs and products.

Responsibilities

  • Performance characterization of cellular system performance in labs and beyond.
  • Comprehend the technical feature set, software design, and develop comprehensive performance-focused test plans to evaluate data, application, and voice performance in various Apple products.
  • Debug, analyze, and troubleshoot with logs across all layers of the baseband protocol stack (L1/L2/L3) to identify issues impacting overall product performance.
  • Test and analyze TCP/IP and application layers to understand their impact on end-to-end product performance and user experience.
  • Drive systems and software performance beyond the lab test phase by ensuring user experience remains solid throughout the product’s lifecycle.
  • Interact cross-functionally across various engineering teams within Apple. Drive open issues across sub-components to a meaningful resolution while striving to improve product quality.
  • Concisely summarize and present overall performance, key findings, open issues, and next steps in cross-functional forums and executive reviews.

Qualifications

  • Experience working in a laboratory environment, testing and benchmarking data, voice and application performance of cellular systems.
  • Deep understanding of cellular 3GPP standards relating to 5G NR and LTE, with demonstrated experience with higher-layer protocols such as TCP/IP.
  • Strong ability to debug and analyze issues across all (L1/L2/L3/Application) layers of the protocol stack, as well as RF frontends.
  • Experience proposing software optimizations and improvements based on performance data to enhance overall product quality and user experience.
  • Experience required working with cellular call boxes and channel emulators in a laboratory setting.
  • Strong knowledge of Python scripting is necessary to automate performance test suites in the laboratory and develop tools and scripts to design key performance indicators (KPIs) required to benchmark product performance.

Skills

Required:Cellular system performance characterization3GPP 5G NR and LTE knowledgeTCP/IPPython scripting

Benefits

  • Comprehensive medical and dental coverage
  • Retirement benefits
  • Discounted products and free services
  • Educational expense reimbursement including tuition
  • Discretionary bonuses or commission payments and relocation eligibility
  • Apple Employee Stock Purchase Plan and discretionary stock awards
  • Other benefits described in Apple benefits program
  • Note: benefits subject to eligibility requirements.
Last updated Oct 23, 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.

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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