Cellular Performance Engineer

Quick Facts

• Role: Cellular Performance Engineer (Wireless software performance)
• Focus: Cellular and higher-layer protocol performance characterization, benchmarking, and end-user experience quality

Description

Lead and drive characterization of wireless software performance in labs and beyond. Develop expertise in cellular systems by benchmarking power and performance for cellular features and Apple products. Serve as a liaison between technology and product engineering teams to gate end-user-facing quality using data-driven testing from prototyping to commercialization.

Responsibilities

• Characterize cellular system performance in labs and beyond
• Develop comprehensive performance-focused test plans to evaluate data, application, and voice performance across Apple products
• Debug and troubleshoot across the baseband protocol stack (L1/L2/L3) using logs; identify issues impacting overall product performance
• Test and analyze TCP/IP and application layers to understand end-to-end product and user experience impact
• Drive systems and software performance beyond the lab test phase, ensuring solid user experience throughout the product lifecycle
• Collaborate cross-functionally, drive open issues across sub-components to resolution, and improve product quality
• Summarize and present performance results, key findings, open issues, and next steps in cross-functional forums and executive reviews

Requirements

• Experience in a laboratory environment testing and benchmarking cellular systems (data, voice, application performance)
• Deep understanding of cellular 3GPP standards for 5G NR and LTE, including higher-layer protocols such as TCP/IP
• Strong ability to debug and analyze issues across L1/L2/L3 and application layers, including RF frontends
• Experience proposing software optimizations based on performance data to improve product quality and user experience
• Experience working with cellular call boxes and channel emulators in a laboratory setting
• Strong Python scripting to automate performance test suites and develop KPI tooling for benchmarking

Benefits

• Opportunity to build cellular performance labs and influence next-generation communication technology and product architecture
• Cross-functional collaboration focused on end-user experience
• Work from prototyping through commercialization using performance data