March 26, 2025

Cellular System Performance Characterization Engineer

Mid • On-site

$143,100 - $264,200/yr

Sunnyvale, CA

Summary

Posted:
Weekly Hours: 40
Role Number:200595146
Do you have a passion for invention and self-challenge? This role is at the center of a silicon design group responsible for crafting and productizing innovative cellular SoCs! As a cellular system performance engineer, you will be responsible for the bringup and validation of end-to-end cellular systems. Join us, and help us innovate new wireless systems technologies that continually outperform the previous iterations! By collaborating with other product development groups across Apple, you’ll push the industry boundaries and improve the product experience for our customers across the world.

Description

In this role, you will be working on the bringup of the cellular end-to-end system including characterization and optimization of RF and system performance in the lab with an emphasis on 5G-NR. Collaborate with multi-functional teams to validate the data and control flows from the Baseband to RF in terms of the various critical metrics. Measure, prioritize, and analyze important metrics data in the lab, and present them with analytics tools. Conduct pre-silicon emulation-based bringup and validation of the cellular system. And simulation-based validation of the control flows and algorithms. Support and maintain high-quality daily Firmware releases.

Minimum Qualifications

  • BS with a minimum of 3 years of relevant experience.
  • 3 years experience in bring up or performance characterization of wireless systems focusing on the PHY and RF layers, as well as hands-on experience in cellular chipsets.
  • Solid understanding of communication theory and signal processing, AGC, beamforming, Tx power control, mitigation of radio impairments, and calibration algorithms.
  • Strong technical background in wireless system physical layer and protocols, as well as 5G-NR/LTE/UMTS (3G/2G)/WiFi.
  • Knowledge of RF performance metrics such as EVM, spectral mask, frequency error and power accuracy etc.
  • Working understanding of multiple 4G/5G signaling, and wireless physical layer test equipment (Keysight/LitePoint/Anritsu/R&S) along with their automation interfaces.
  • Hands-on experience in bring up of RFIC in the lab and ability to efficiently use lab equipment (such as VSA, VSG, spectrum analyzer, signal generator, power meter, etc).
  • Good experience with Python, C/C++, Matlab, and efficient analysis and automation scripting.

Preferred Qualifications

  • MSEE or beyond is preferred.
  • Knowledge and understanding of 3GPP specifications.
  • Experience with silicon prototyping, emulation systems, and virtual platforms.
  • Experience with analytics platform software (Tableau, Spotfire or similar).
  • Work experience in 5G-NR/LTE/UMTS (3G/2G)/WiFi.

Pay & Benefits

  • At Apple, base pay is one part of our total compensation package and is determined within a range. This provides the opportunity to progress as you grow and develop within a role. The base pay range for this role is between $143,100 and $264,200, and your base pay will depend on your skills, qualifications, experience, and location.

    Apple employees also have the opportunity to become an Apple shareholder through participation in Apple’s discretionary employee stock programs. Apple employees are eligible for discretionary restricted stock unit awards, and can purchase Apple stock at a discount if voluntarily participating in Apple’s Employee Stock Purchase Plan. You’ll also receive benefits including: Comprehensive medical and dental coverage, retirement benefits, a range of discounted products and free services, and for formal education related to advancing your career at Apple, reimbursement for certain educational expenses — including tuition. Additionally, this role might be eligible for discretionary bonuses or commission payments as well as relocation. Learn more about Apple Benefits.

    Note: Apple benefit, compensation and employee stock programs are subject to eligibility requirements and other terms of the applicable plan or program.

  • Apple is an equal opportunity employer that is committed to inclusion and diversity. We take affirmative action to ensure equal opportunity for all applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, Veteran status, or other legally protected characteristics. Learn more about your EEO rights as an applicant.