SI/PI Engineer

About the Company

Etched is building hardware for frontier intelligence. We co-design chips, racks, software, and manufacturing to deliver best-in-class throughput and latency across both prefill and decode workloads. Our first products are heavily focused on inference.

Responsibilities

• Perform pre- and post-layout SI simulations for high-speed serial interfaces including PCIe Gen5/Gen6, 112G/224G Ethernet
• Conduct channel analysis and link budget calculations; define topology constraints, trace geometry, stack-up requirements, and via optimization guidelines
• Develop and maintain COM, IBIS, S-parameter, and SPICE models; correlate simulation results against lab measurements
• Execute power delivery network (PDN) design and analysis including target impedance profiling and IR-drop simulation
• Drive DFI and design rule checks for SI/PI compliance using Cadence Allegro / Sigrity or Ansys SIwave
• Collaborate with PCB design and ASIC teams to define and review design guidelines
• Support bring-up, debug signal quality issues, and document root-cause findings
• Develop and maintain simulation-to-hardware correlation databases

Requirements

• B.S. or M.S. in Electrical Engineering or a closely related discipline
• 5+ years of hands-on SI/PI experience on high-speed designs (>1 Gbps serial links or DDR4/5 and HBM3/4 memory interfaces)
• Proficiency with industry SI/PI EDA tools (Cadence Sigrity, Ansys SIwave/HFSS, Keysight ADS, or equivalent)
• Strong understanding of transmission line theory, return-loss, insertion-loss, crosstalk, eye-diagram analysis, and jitter decomposition
• Experience with PDN modelling, target impedance methodology, and DC IR analysis
• Working knowledge of multi-layer PCB stack-up design and controlled-impedance trace routing
• Hands-on lab skills including VNA, TDR, BERT operation, and oscilloscope probing

Preferred Qualifications

• Prior work in data center, AI/ML accelerator, networking, or high-performance computing (HPC) hardware environments
• Experience scripting automated SI/PI simulation flows using Python or MATLAB

Benefits

• Medical, dental, and vision packages with generous premium coverage
• $500 per month credit for waiving medical benefits
• Housing subsidy of $2k per month for those living within walking distance of the office
• Relocation support for those moving to San Jose
• Various wellness benefits covering fitness and mental health
• Daily lunch and dinner in our office
• Unlimited compute budget subject to ROI justification