Signal & Power Integrity Engineer, Annapurna Labs - AI Silicon Packaging

Amazon Web Services (AWS); Austin (TX); On-site; USD 136,000 - 184,000; Full time

Job summary

Annapurna Labs (our organization within AWS) seeks a Signal or Power Integrity Engineer to contribute to SI/PI analysis and optimization for advanced packaging in data center ASICs.

Responsibilities include simulations, modeling interconnects, and coordinating with die- and board-teams to meet performance and power targets. Strong EM/SI skills and packaging knowledge required.

Qualifications

• BS degree in electrical engineering or equivalent.
• 5+ years in signal integrity, power integrity, or package design.
• Understand SI or PI with awareness of the other.
• Experience with EM simulation and SI/PI tools (HFSS, Sigrity, ADS).
• Knowledge of 2.5D/3D-IC, interposers, RDL, TSVs, microbumps.
• Familiar with stack-up design and impedance control.
• Strong communication across silicon, package and board teams.
• MS with 3+ years in SI/PI or package design.
• Experience with PCIe/UCIe or SerDes at package level.
• Ability to correlate SI/PI simulations with lab measurements.
• Familiarity with DFE/CTLE/FFE or PDN impedance methods.
• Interest in chip-package-board co-design.
• Exposure to high-density fan-out or silicon bridge packaging.
• Thermal-aware analysis, electromigration, EMC/EMI considerations.

Responsibilities

• Perform package-level SI or PI simulations for 2.5D, 3D-IC and related architectures.
• Assist with package stack-up design and impedance control studies.
• Run high-speed channel simulations and analyze die-to-die and die-to-board interfaces.
• Model interconnects like microbumps, TSVs, RDL traces for signal/power paths.
• Build and validate decoupling models (on-die caps, DTCs, IPD caps).
• Coordinate with SoC die teams and board design for co-optimization.
• Flag manufacturing risks and propose mitigation for warpage and via issues.

Skills

SI/PI analysis

package design

2.5D/3D-IC packaging

communication skills

team collaboration

EM simulation

Education

BS in electrical engineering

MS in relevant field

Tools

HFSS

Cadence Sigrity (PowerSI/PowerDC/Clarity)

ADS

Job description

Annapurna Labs (our organization within AWS) designs silicon and software that accelerates innovation. Customers choose us to create cloud solutions that solve challenges that were unimaginable a short time ago—even yesterday. Our custom chips, accelerators, and software stacks enable us to take on technical challenges that have never been seen before, and deliver results that help our customers change the world.

We are seeking a Signal or Power Integrity Engineer to join our hardware team and contribute to SI/PI analysis and optimization of advanced packaging solutions for next-generation machine learning and data center ASICs.

In this role, you will support the package-level signal or power integrity effort — performing detailed simulations, building models, and contributing to design decisions across IC, package, and board boundaries. You'll work closely with senior engineers to help ensure our advanced packaging technologies meet performance, power delivery, and manufacturing targets.

Key job responsibilities

• Perform package-level SI or PI simulations for 2.5D, 3D-IC, fan-out, and silicon interposer/bridge architectures under guidance from senior engineers.
• Support package stack-up design: assist with dielectric material evaluation, impedance control analysis, layer assignment, and RDL routing studies.
• Run high-speed channel simulations (S-parameter extraction, time-domain analysis, eye diagrams) for die-to-die and die-to-board interfaces, or analyze package PDN performance (decoupling effectiveness, plane resonance, IR drop, AC impedance).
• Model advanced interconnects: microbumps, C4 bumps, TSVs, microvias, PTH vias, and RDL traces for signal or power paths.
• Build and validate models for decoupling technologies such as on-die capacitance, deep trench capacitors (DTCs), or IPD capacitors as needed.
• Coordinate with SoC die-level teams and board design teams to gather requirements and support co-optimization of package architecture.
• Flag potential package manufacturing risks - warpage, via reliability, impedance variation - and propose mitigation approaches.

A day in the life

Our team is dedicated to supporting new members. We have a broad mix of experience levels and tenures, and we’re building an environment that celebrates knowledge-sharing and mentorship. Our senior members enjoy one-on-one mentoring and thorough, but kind, code reviews. We care about your career growth and strive to assign projects that help our team members develop your engineering expertise so you feel empowered to take on more complex tasks in the future.

Diverse Experiences

AWS values diverse experiences. Even if you do not meet all of the qualifications and skills listed in the job description, we encourage candidates to apply. If your career is just starting, hasn’t followed a traditional path, or includes alternative experiences, don’t let it stop you from applying.

About AWS

Amazon Web Services (AWS) is the world’s most comprehensive and broadly adopted cloud platform. We pioneered cloud computing and never stopped innovating — that’s why customers from the most successful startups to Global 500 companies trust our robust suite of products and services to power their businesses.

Inclusive Team Culture

Here at AWS, it’s in our nature to learn and be curious. Our employee-led affinity groups foster a culture of inclusion that empower us to be proud of our differences. Ongoing events and learning experiences, including our Conversations on Race and Ethnicity (CORE) and AmazeCon (gender diversity) conferences, inspire us to never stop embracing our uniqueness.

Work/Life Balance

We value work-life harmony. Achieving success at work should never come at the expense of sacrifices at home, which is why we strive for flexibility as part of our working culture. When we feel supported in the workplace and at home, there’s nothing we can’t achieve in the cloud.

Mentorship & Career Growth

We’re continuously raising our performance bar as we strive to become Earth’s Best Employer. That’s why you’ll find endless knowledge-sharing, mentorship and other career-advancing resources here to help you develop into a better-rounded professional.

Basic Qualifications

• BS degree in electrical engineering or equivalent
• 5+ years of experience in signal integrity, power integrity, or package design
• Solid understanding of either SI (S-parameter extraction, crosstalk, return loss, channel analysis) or PI (PDN impedance analysis, IR drop, decoupling strategy), with working awareness of the other
• Experience with EM simulation and SI/PI tools such as HFSS, Cadence Sigrity (PowerSI, PowerDC, Clarity), ADS, or equivalent
• Understanding of advanced packaging technologies: 2.5D/3D-IC, silicon interposers, fan-out wafer-level packaging, RDL, TSVs, and microbump interconnects
• Familiarity with stack-up design and impedance control for multi-layer organic substrates or silicon interposers.
• Good communication skills with the ability to participate in technical discussions across silicon, package, and board teams

Preferred Qualifications

• MS with 3+ years in signal integrity, power integrity, or package design
• Exposure to high-speed serial protocols (PCIe, UCIe, or custom SerDes) at the package level
• Experience correlating SI/PI simulations with lab measurements (TDR, VNA, oscilloscope)
• Familiarity with equalization techniques (DFE, CTLE, FFE) or PDN target impedance methodology
• Interest or experience in package co-design methodologies (chip-package-board co-simulation)
• Familiarity with high-density fan-out or silicon bridge packaging (e.g., EMIB, CoWoS, or similar)
• Exposure to package-level thermal-aware analysis, electromigration, or EMC/EMI considerations

Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability, or other legally protected status.

Los Angeles County applicants: Job duties for this position include: work safely and cooperatively with other employees, supervisors, and staff; adhere to standards of excellence despite stressful conditions; communicate effectively and respectfully with employees, supervisors, and staff to ensure exceptional customer service; and follow all federal, state, and local laws and Company policies. Criminal history may have a direct, adverse, and negative relationship with some of the material job duties of this position. These include the duties and responsibilities listed above, as well as the abilities to adhere to company policies, exercise sound judgment, effectively manage stress and work safely and respectfully with others, exhibit trustworthiness and professionalism, and safeguard business operations and the Company’s reputation. Pursuant to the Los Angeles County Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.

Our inclusive culture empowers Amazonians to deliver the best results for our customers. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, including support for the interview or onboarding process, please visit https://amazon.jobs/content/en/how-we-hire/accommodations for more information. If the country/region you’re applying in isn’t listed, please contact your Recruiting Partner.

The base salary range for this position is listed below. Your Amazon package will include sign-on payments and restricted stock units (RSUs). Final compensation will be determined based on factors including experience, qualifications, and location. Amazon also offers comprehensive benefits including health insurance (medical, dental, vision, prescription, Basic Life & AD&D insurance and option for Supplemental life plans, EAP, Mental Health Support, Medical Advice Line, Flexible Spending Accounts, Adoption and Surrogacy Reimbursement coverage), 401(k) matching, paid time off, and parental leave. Learn more about our benefits at https://amazon.jobs/en/benefits.

USA, CA, Cupertino - 157,300.00 - 212,800.00 USD annually

USA, TX, Austin - 136,000.00 - 184,000.00 USD annually

Company - Annapurna Labs (U.S.) Inc.

Job ID: A10377222