Signal Integrity Engineer: High-Speed Data & PAM4

Molex; Lisle (IL); On-site; USD 80,000 - 150,000; Full time

Benefits offered by this job

Medical, dental, vision

Educational assistance

Paid vacation

401(k) retirement benefits

Paid parental leave

Job summary

Molex is seeking a Signal Integrity Systems Engineer to design next‑gen active cable platforms and influence hyperscale data center solutions. You’ll collaborate with ASIC/PHY, hardware, and validation teams, support customer demonstrations, and deliver compelling SI reports while advancing 112G/224G PAM4 channel designs.

You will work closely with lab facilities and marketing teams to translate customer needs into best‑in‑class solutions, drive root‑cause investigations, and help set industry

Qualifications

• Bachelor's in Electrical Engineering, Electrical & Computer Engineering, or related field.
• Experience in high-speed signal integrity, channel modeling, or system validation.
• Good understanding of transmission-line theory, S-parameters, crosstalk, loss/dispersion, reflections and impedance discontinuities, jitter, BER, and equalization.
• Experience with HFSS, Keysight ADS/PLTS, Cadence Sigrity, or similar tools.

Responsibilities

• Own system-level SI analysis for high-speed channels including AEC, ACC, DAC, connectors, and PCB interconnects.
• Develop and analyze end-to-end channels for 112G and 224G PAM4 applications.
• Develop and analyze S-parameter models, correlate simulation models against VNA measurements.
• Perform IBIS-AMI and electrical simulations for high-speed PAM4 channels.
• Perform system-level BER, eye, jitter, and SNR analysis and identify channel performance limitations.
• Correlate simulation, VNA, TDR, and oscilloscope measurements with system-level results.
• Troubleshoot SI issues across PCB, connector, cable, package, and silicon interfaces.
• Work closely with ASIC/PHY, hardware, PCB, connector, cable, firmware, and validation teams.
• Support customer demonstrations, interoperability testing, plugfests, and technical reviews.
• Create technical reports and present SI results to customers and internal engineering teams.
• Lead root-cause investigations and recommend design improvements.

Skills

High-speed SI

Channel modeling

System validation

Transmission-line theory

S-parameters

Jitter & BER

Equalization

Crosstalk & impedance

Cross-functional comms

Education

Bachelor's in Electrical Engineering or related

Master's degree in EE or related

PhD (advantage)

Tools

HFSS

Keysight ADS/PLTS

Cadence Sigrity

Python scripting

MATLAB

Job description

Molex is seeking a Signal Integrity Systems Engineer to design next‑gen active cable platforms and influence hyperscale data center solutions. You’ll collaborate with ASIC/PHY, hardware, and validation teams, support customer demonstrations, and deliver compelling SI reports while advancing 112G/224G PAM4 channel designs.

You will work closely with lab facilities and marketing teams to translate customer needs into best‑in‑class solutions, drive root‑cause investigations, and help set industry