Senior Ic Design Engineer – Io Signal Integrity & Power Delivery

Cerebras · Semiconductors · Headquarters +1 · Silicon

This role focuses on the physical design and signal integrity of custom IO interfaces for Cerebras' AI chip, which is designed to accelerate AI training and inference. The engineer will be responsible for ensuring the performance, power, and reliability of these interfaces across various levels of integration (die, package, system).

What you'd actually do

  1. Own IO signal integrity and power delivery analysis for custom and third-party IP integration in full system stack: die level, 3d integration, board level
  2. Define interface architecture and design specifications, including signaling schemes, impedance targets, and power distribution requirements.
  3. Perform and review channel modeling, IBIS-AMI/SPICE simulations, and system-level SI/PI analysis to ensure timing and margin robustness.
  4. Collaborate with internal and external IP providers to evaluate, select, and integrate custom IO and PHY solutions.
  5. Lead power delivery network (PDN) modeling and IR-drop analysis, driving improvements across chip, package, and board.

Skills

Required

  • 10+ years of experience in IC or IO design, analysis, or integration.
  • Deep understanding of signal integrity, power integrity, and high-speed interface design (DDR, LPDDR, HBM, or similar).
  • Experience with 3d or 2.5d integration, interposers, die stacking
  • Strong knowledge of FinFET CMOS technology and transistor-level device behavior.
  • Expert with HSPICE, FineSim, or equivalent circuit and transient simulation tools.
  • Experience with channel and package modeling, S-parameter extraction, and time/frequency-domain analysis.
  • Proficient in IR-drop analysis, PDN optimization, and decoupling network design.
  • Solid understanding of IO and ESD circuit fundamentals, including protection and clamp strategies.
  • Experience running aging and reliability simulations and applying results to design optimization.
  • Strong scripting and automation experience in Tcl, Python, or similar.

Nice to have

  • Ph.D. preferred