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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.