Apple
Cellular Performance Engineer
$150K–$278K
Sunnyvale, California · Full-time · Posted Oct 22, 2026
About the job
Characterize and improve cellular software performance across Apple products, from laboratory testing through commercialization and product lifecycle support.
What you'll do
- Build and conduct cellular performance characterization in labs and beyond, including test plans and benchmarking.
- Debug issues across protocol-stack layers, RF frontends, TCP/IP, and application layers; propose data-driven software improvements.
- Coordinate issue resolution across engineering teams and present findings, open issues, and next steps.
What they ask for
- Laboratory experience testing and benchmarking cellular data, voice, and application performance.
- Deep understanding of 5G NR and LTE 3GPP standards, with demonstrated experience in higher-layer protocols such as TCP/IP.
- Experience debugging and analyzing protocol-stack layers (L1/L2/L3/Application) and RF frontends, and proposing software optimizations based on performance data.
- Experience with cellular call boxes and channel emulators in a lab; strong Python scripting for test automation and KPI tools.
Nice to have
- Strong collaboration and communication across multidisciplinary teams.
- Problem-solving skills and ability to deliver results in fast-paced environments.
Pay
$150,400 and $277,600 (USD, base salary)
Tools
5G NR, LTE, TCP/IP, Python, L1/L2/L3
Model-written summary · the original posting is authoritative