Signal Integrity Engineer - Memory Interface

Apple Inc.; San Francisco (CA); On-site; USD 185,000 - 325,000; Full time

Job summary

Apple Inc. in the San Francisco Bay Area seeks a Signal Integrity Engineer for memory interface work on Apple SoCs. You will handle SI/PI modeling, design feedback, and lab validation across package, MLB, and PCB integration.

Required are a strong memory interface background, experience with DDR/LPDDR signaling, and proficiency in Python. The role involves collaboration with multiple teams and ongoing testing and validation.

Qualifications

• BS + 10 years of industry experience.
• Prefers MSEE or PhD with strong SI/PI background.
• Experience with memory interfaces and package/board design.
• Lab correlation/validation of simulation results.
• Proficiency with VNA, TDR, scopes and spectrum analyzers.
• Strong Python coding skills and AI-assisted workflows.

Responsibilities

• Conduct end-to-end SI/PI simulation studies for memory systems.
• Model channels and PDN from die/interposer/PKG/PCB/PMU to meet timing specs.
• Provide guidelines to silicon, package, and system design teams.
• Correlate simulations with silicon measurements and lab results.

Skills

SI/PI modeling

Memory interface

Python programming

Channel modeling

Education

B.S. Electrical Engineering

M.S.E.E. or PhD preferred

Tools

VNA

TDR

Oscilloscope

Spectrum analyzer

Job description

Signal Integrity Engineer - Memory Interface

San Francisco Bay Area, California, United States Hardware

In this position, you will work with the team that develops SOCs used within Apple's mobile devices. You will be specifically responsible for memory interface signal integrity for Apple SoCs, covering the span from package to board. Prior design and modeling experience with DDR or LPDDR interfaces are a must-have.

Description

• You will work on electrical and physical design of memory systems.
• Work on electrical extraction and validation of package and MLB.
• Work with circuit and controller team to optimize memory system design.
• Work on SI and PI modeling, simulation, and characterization memory interface.
• Develop and execute test plans to validate signal and power integrity.
• Work with product engineering and system engineering to debug and to improve product yield.

Responsibilities

• Conduct end-to-end signal integrity and power integrity simulation studies of memory system including modeling of channels and power delivery networks of die/interposer/PKG/PCB/PMU to meet tight timing and voltage spec.
• Provide feedbacks and guidelines to silicon floorplan, package, system design, and other cross-functional teams.
• Provide optimal IO settings and design guideline to cross-functional teams.
• Perform feasibility study for next generation of signaling scheme.
• Perform correlation between simulation and silicon measurement.

Minimum Qualifications

• BS + 10 years of industry experience.

Preferred Qualifications

• MSEE + 8 years of industry experience and or Ph.D. preferred.
• We are looking for someone who is familiar with signal and power integrity issues of memory interfaces.
• Prior experience working with actual product package/board design and analysis, PI/SI methodology development, and lab correlation/validation of the simulation results.
• Excellent academic background.
• Familiar with lab equipment, such as: VNA, TDR, real-time scope, spectrum analyzer, etc.
• Strong fundamentals in 3D/2D EM simulation tools and transmission line theory.
• Proficient in Python with strong foundational coding skills and expertise in leveraging generative AI coding assistants to enhance productivity.

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 $184,700 and $324,800, 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 seek to promote 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

At Apple, we believe accessibility is a fundamental human right. You’ll find that idea reflected in everything here - in our culture, our benefits and our digital tools. By welcoming as many perspectives as possible, we help you build a career where you feel like you belong.

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Apple accepts applications to this posting on an ongoing basis.