Senior Signal Integrity Engineer

Amphenol Communications Solutions (ACS), a division of Amphenol Corporation, is a world leader in interconnect solutions for Communications, Mobile, RF, Optics, and Commercial electronics markets. Amphenol Corporation is one of the world’s largest designers and manufacturers of electrical, electronic and fiber optic connectors and interconnect systems, antennas, sensors and sensor-based products and coaxial and high-speed specialty cable.

About the Role

The High-Speed I/O R&D team is seeking an experienced Signal Integrity (SI) Engineer to drive the electrical design, simulation, validation, and optimization of next-generation Active Electrical Cables (AEC), optical transceivers, Linear Pluggable Optics (LPO), and high-speed networking products supporting 800G, 1.6T and future generation applications. This role requires deep expertise in high-speed serial channels, DSPs, retimers, SerDes architectures, PCB design, cable assemblies, optical modules, and signal integrity analysis from concept through production.

Responsibilities

• Develop channel architectures for high-speed copper and optical interconnect products.
• Perform pre-layout and post-layout SI simulations for channels operating at 224G PAM4 and beyond.
• Analyze insertion loss, return loss, crosstalk, impedance discontinuities, and channel compliance.
• Optimize PCB stack-ups, via structures, connector interfaces, cable constructions, and package transitions.
• Develop channel budgets and link performance models.
• Design and evaluate Active Electrical Cable (AEC) architecture utilizing DSPs and retimers.
• Perform channel simulations for DAC, ACC, and AEC products.
• Collaborate with cable suppliers on manufacturing feasibility and performance optimization.
• Evaluate and optimize high-speed channels utilizing DSPs and retimers from leading semiconductor vendors.
• Analyze equalization performance, FEC impacts, CTLE, DFE, and adaptive link behavior.
• Support device bring-up, characterization, and compliance testing.
• Develop correlation between simulation and measured performance.
• Perform channel characterization using VNAs, TDRs, oscilloscopes, and BERT systems.
• Analyze eye diagrams, COM, SNDR, BER, jitter, and equalization performance.
• Support compliance testing and customer qualification activities.
• Work closely with PCB design, mechanical, thermal, process, firmware, manufacturing, and supplier teams.
• Drive technical decisions related to channel architecture, stack-up selection, and manufacturing tradeoffs.
• Support customer design reviews and technical engagements.

Requirements

• BS, MS, or PhD in Electrical Engineering or related field.
• 5+ years of experience in high-speed signal integrity engineering.
• Strong understanding of high-speed serial interfaces and networking systems.
• Experience with 56G, 112G, and preferably 224G PAM4 technologies.
• Experience developing products using DSPs and retimers.
• Experience with active copper cables AEC, DACs, ACCs.
• Strong understanding of PCB design, stack-ups, via optimization, and transmission line theory.
• Experience with S-parameter analysis and channel modeling.

Preferred Qualifications

• Experience with QSFP-DD, OSFP, OSFP-XD I/O cable assembly products.
• Familiarity with Broadcom, Credo, Marvell, Astera Labs, or similar DSP/retimer solutions.
• Familiarity with CMIS and MSA specifications.
• Experience supporting NPI, qualification, and volume manufacturing.
• Experience with Ansys HFSS, COM and IEEE channel compliance methodologies.

Amphenol Corporation offers the opportunity for career growth within a global organization and provides high levels of support and responsiveness to both employees and customers.