Senior Signal Integrity Engineer

Amphenol Corporation; Nashua (NH); On-site; USD 110,000 - 180,000; Full time

Job summary

Amphenol Communications Solutions in Nashua, NH seeks a Senior Signal Integrity Engineer for next‑gen Active Electrical Cables and high‑speed modules. You’ll own electrical design, simulation, validation, and optimization from concept to production for 224G PAM4 and beyond.

Responsibilities include SI analysis, channel budgets, AEC development, DSP/retimer integration, and lab validation with VNAs, TDRs, and BERT.

Qualifications

• 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.

Responsibilities

• Develop channel architectures for high-speed copper and optical interconnects.
• Run pre-layout and post-layout SI simulations for channels at 224G PAM4 and beyond.
• Analyze insertion loss, return loss, crosstalk, impedance, and channel compliance.
• Optimize PCB stack-ups, via structures, interfaces, and cable constructions.
• Develop channel budgets and link performance models.
• Design Active Electrical Cable (AEC) architecture using DSPs/retimers.
• Simulate DAC, ACC, and AEC channels.
• Collaborate with cable suppliers on manufacturability and performance.
• Evaluate DSP/retimer-based channels and assess equalization, CTLE, DFE.
• Support device bring-up, characterization, and compliance testing.
• Correlation between simulation and measurements; lab validation.
• Characterize channels using VNAs, TDRs, oscilloscopes, BERT.
• Analyze eye diagrams, COM, SNDR, BER, jitter.
• Lead cross-functional decisions with PCB/mechanical/thermals teams.

Skills

High-speed SI

DSPs & Retimers

S-parameter analysis

Channel modeling

PCB design

Eye diagrams

Transmission line theory

Education

BS, MS, or PhD in Electrical Engineering or related field

Tools

Ansys HFSS

IEEE channel compliance

Job description

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. ACS has an expansive global presence in research and development, manufacturing, and sales. We design and manufacture a wide range of innovative connectors as well as cable assemblies for diverse applications including server, storage, data center, mobile, RF, networking, industrial, business equipment, and automotive.

Position: Senior Signal Integrity Engineer High-Speed Active Electrical Cables

Location: Nashua, NH

Amphenol High Speed Products Group is the market leader for high speed, high bandwidth electrical connectors for the Telecom/Datacom market (Mobile Networks, Storage, Servers, Routers, Switches, etc.). Our products help to enable the electronics revolution and remain a key enabler for all the major Tier 1 OEMs globally. Our global headquarters are located in Nashua, NH and we have design, sales and manufacturing locations globally.

Position Summary

We are seeking an experienced Signal Integrity (SI) Engineer to join our High-Speed I/O R&D team. The successful candidate will be responsible for 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

Signal Integrity Design & Analysis

• 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.

AEC and Copper Interconnect Development

• 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.

DSP & Retimer Integration

• 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.

Laboratory Validation

• 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.

Cross-Functional Leadership

• 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.

Required Qualifications

• 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 Experience

• 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.

Ansys HFSS, COM and IEEE channel compliance methodologies.

Amphenol Corporation is proud of our reputation as an excellent employer. Our focus is to provide the highest level of support and responsiveness to both our employees and our customers, the world's largest technology companies. Amphenol Corporation offers the opportunity for career growth within a global organization. We believe that Amphenol Corporation is unique in that every employee, regardless of his or her position, has the ability to positively impact the business.

Amphenol is an “Equal Opportunity Employer” - Minority/Female/Disabled/Veteran/Sexual Orientation/Gender Identity/National Origin. For additional company information please visit our website at https://www.amphenol-cs.com/