Cellular System Performance Characterization Engineer

Apple Inc

Confirmed live 2 days ago High trust

Quick summary

Work type
On-site
Location
Sunnyvale, CA
Salary
$129,300–$225,300 / yr
Posted
99 days ago
Freshness
Confirmed live 2 days ago

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Competitive pay

How this pay compares to similar roles

Similar $186k
This role $177k
$118k most similar roles pay here $237k

This role pays less than 52% of similar roles. Most pay $155,284–$216,250 — the shaded band above. At the midpoint, this role pays about $177k versus about $186k for comparable roles.

Based on 240 similar postings.

Employer

About Apple Inc

Apple Inc. is a multinational technology company known for designing and manufacturing consumer electronics, software, and online services, including the iPhone, Mac, iPad, and App Store. Industry: Consumer Electronics & Software

Apple Inc currently has 1984 open roles on FindRole.

Listed pay typically runs $175,000–$277,600 across 1590 roles with salary data.

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At a glance

TL;DR · Cellular System Performance Characterization Engineer

The Cellular System Performance Characterization Engineer joins the modem and RF team to perform bringup, characterization, and optimization of cellular end-to-end systems with a specific focus on 5G-NR technology. The role involves measuring, prioritizing, and analyzing critical metrics in a lab environment while collaborating with multi-functional teams to validate data and control flows from baseband to RF. Key responsibilities include designing in-house scripting tools for chipset bringup, conducting pre-silicon emulation-based validation, and maintaining high-quality firmware releases. Candidates must possess skills in Python, C/C++, Matlab, and automation scripting, alongside knowledge of RF performance metrics like EVM and spectral mask. The role requires experience with lab equipment such as spectrum analyzers and signal generators, along with a deep understanding of communication theory, signal processing, 3GPP specifications, and wireless physical layer protocols to solve complex cellular system challenges.

What you'll do

  • Perform bringup, characterization, and optimization of 5G-NR cellular end-to-end systems in a lab environment.
  • Validate data and control flows from the Baseband to RF across critical performance metrics.
  • Develop in-house scripting tools for chipset bringup and instrument automation.
  • Conduct pre-silicon emulation-based bringup and simulation-based validation of algorithms and control flows.
  • Measure, prioritize, and analyze key performance metrics using analytics tools.
  • Enhance measurement methodologies and software packages to improve coverage and efficiency during the design validation process.
  • Maintain high-quality hardware platforms for daily firmware releases and continuous development.

What we're looking for

  • A bachelor's degree is required, with a Master of Science in Electrical Engineering preferred.
  • Experience with Python, C/C++, and Matlab for analysis and automation scripting.
  • Knowledge of RF performance metrics such as EVM, spectral mask, frequency error, and power accuracy.
  • Hands-on experience bringing up RFICs in a lab using equipment like VSA, VSG, spectrum analyzers, and signal generators.
  • Understanding of communication theory, signal processing, AGC, beamforming, Tx power control, and calibration algorithms.
  • Knowledge of 3GPP specifications and technical background in wireless system physical layer and protocols.
  • Experience with silicon prototyping, emulation systems, virtual platforms, and analytics software like Tableau or Spotfire.
  • Experience in performance characterization of wireless systems focusing on PHY and RF layers for 4G/5G/LTE/WiFi.

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