{"title": "Cellular System Performance Engineer", "summary": "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\u2019ll push the industry boundaries and improve the product experience for our customers across the world.", "description": "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.", "key_qualifications": "Experience in bring up or performance characterization of wireless systems focusing on the PHY and RF layers. Hands-on experience in cellular chipsets is helpful. 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. Work experience in 5G-NR/LTE/UMTS (3G/2G)/WiFi is a plus. Knowledge of RF performance metrics such as EVM, spectral mask, frequency error, 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 is nice to have. Hands-on experience in bring up of RFIC in the lab, 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. Knowledge and understanding of 3GPP specs are desirable. Experience with silicon prototyping, emulation systems, and virtual platforms is a plus. Experience with analytics platform software (Tableau, Spotfire or similar) a plus.", "preferred_qualifications": "", "education_experience": "BS and 3+ years of relevant industry experience required MS or Ph.D. in CS/EE or equivalent is preferred.", "additional_requirements": "", "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\u2019s 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\u2019s Employee Stock Purchase Plan. You\u2019ll 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 \u2014 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.", "company": "apple"}