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Staff Signal Integrity and Power Integrity Engineer (SI/PI)

Zoox· Advanced Hardware Engineering – Electrical Engineering
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Foster City, CA$259k - $311kFull-timePosted 1mo ago

About the role

Senior SI/PI engineer responsible for defining architectures, methodologies, and end-to-end sign-off for high-speed interfaces and power delivery in Zoox’s robotaxi hardware.

Responsibilities

  • Lead the SI/PI architecture and define constraints for next-generation, high-complexity, high-density PCBs and overall system design.
  • Collaborate at an architectural level with hardware design, silicon vendors, PCB layout, and mechanical engineering teams to define layer stack-ups, routing strategies, component placement, and power delivery architectures.
  • Analyze, optimize, and sign off on advanced high-speed serial links (PCIe, Ethernet, MIPI, GMSL) and memory interfaces (LPDDR).
  • Provide expert-level design guidance and validation for automotive-specific communication and audio protocols (A2B).
  • Architect and conduct comprehensive Power Delivery Network (PDN) analysis, including DC IR drop, AC impedance modeling, and transient response analysis to ensure stable power delivery across complex multi-board systems.
  • Drive the development of advanced SI/PI routing rules, simulation methodologies, automation scripts, and sign-off processes for the hardware engineering department.
  • Tackle the most complex, unprecedented signal and power integrity challenges, performing hands-on root-cause analysis, lab measurements, and correlating simulation models with real-world testing.
  • Act as a technical mentor and subject matter expert, elevating the SI/PI capabilities of the entire hardware organization and guiding junior to senior engineers.

Qualifications

  • Bachelor’s, Master’s, or Ph.D. in Electrical Engineering, Computer Engineering, Physics, or a closely related technical field.
  • 10+ years of proven industry experience in signal and power integrity analysis for complex high-speed digital designs.
  • Extensive, proven track record designing, simulating, and troubleshooting high-speed interfaces, specifically PCIe, multi-gigabit Ethernet, MIPI (CSI/DSI), and GMSL, through multiple successful product lifecycles.
  • Deep expertise in memory interface design and simulation, with a strong focus on advanced LPDDR technologies.
  • Familiarity with automotive audio and sensor bus protocols, such as A2B.
  • Advanced proficiency with industry-standard 2D/3D electromagnetic extraction and SI/PI simulation tools (e.g., Ansys HFSS/SIwave, Keysight ADS, Cadence Sigrity, or Siemens EDA/HyperLynx).
  • Mastery of electromagnetics, transmission line theory, cross-talk, jitter, and advanced PDN design principles.
  • Expert-level hands-on experience with high-speed lab characterization equipment, including Vector Network Analyzers (VNAs), Time-Domain Reflectometers (TDRs), and high-bandwidth oscilloscopes.

Skills

Required:SI/PI architectureHigh-speed interfacesLPDDR memory interfaces

Benefits

  • Paid time off (sick leave, vacation, bereavement)
  • Unpaid time off
  • Zoox Stock Appreciation Rights
  • Amazon RSUs
  • Health insurance
  • Long-term care insurance
  • Long-term and short-term disability insurance
  • Life insurance
Last updated Oct 21, 2026. Interested? Apply on the company site.
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About Zoox

It's Not a Car | Zoox

Zoox is a purpose-built autonomous vehicle designed for riders, not drivers. Learn more about the Zoox robotaxi and the future of ride-hailing.

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