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

The role

You will be the lead technical expert for signal and power integrity on next-generation robotaxi electronic systems. You will define SI/PI architecture, set simulation methods, guide design and layout teams, and sign off high-speed interfaces.

What you will do

• Lead SI/PI architecture and define constraints for high-complexity, high-density PCBs and system design.
• Work with hardware design, silicon vendors, PCB layout and mechanical teams on stack-ups, routing, component placement and power delivery.
• Analyze, optimize and sign off high-speed serial links (PCIe, Ethernet, MIPI, GMSL) and memory interfaces (LPDDR).
• Provide design guidance and validation for automotive communication and audio protocols (A2B).
• Perform Power Delivery Network analysis, including DC IR drop, AC impedance and transient response.
• Develop SI/PI routing rules, simulation methods, automation scripts and sign-off processes for the hardware department.
• Do hands-on root-cause analysis, lab measurements, and correlate simulation models with real-world testing.
• Mentor junior to senior engineers and raise SI/PI capability across the hardware organization.

Required qualifications

• Bachelor's, Master's or Ph.D. in Electrical Engineering, Computer Engineering, Physics or a closely related technical field.
• 10+ years of industry experience in signal and power integrity analysis for complex high-speed digital designs.
• Proven track record designing, simulating and troubleshooting PCIe, multi-gigabit Ethernet, MIPI (CSI/DSI) and GMSL interfaces through multiple product lifecycles.
• Deep expertise in memory interface design and simulation, with a focus on advanced LPDDR.
• Familiarity with automotive audio and sensor bus protocols such as A2B.
• Advanced proficiency with 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.
• Expert hands-on experience with lab equipment including VNAs, TDRs and high-bandwidth oscilloscopes.

Nice to have

• Direct automotive industry experience, particularly developing hardware for ADAS or autonomous vehicles.
• Understanding of automotive reliability standards, compliance requirements and designing for harsh environments.
• Extensive experience with high-layer-count HDI PCB design and advanced packaging.
• Proven ability to influence technical strategy, drive cross-functional alignment and explain technical trade-offs to executives and non-SI/PI stakeholders.

About the company

Zoox is developing next-generation robotaxi systems. This posting is for its advanced hardware engineering team.