Signal Integrity Systems Engineer

Flint Hills Resources; Lisle (IL); On-site; USD 100,000 - 150,000; Full time

Job summary

Molex is seeking a Signal Integrity Systems Engineer to design and validate high-speed interconnects for data services, including PAM4 channels and 112G/224G efforts. You will own system-level SI analysis, develop end-to-end models, and coordinate with ASIC/PHY, hardware, and validation teams.

You will collaborate with hyperscale customers and marketing to translate application needs into robust solutions, create technical reports, and support demonstrations and plugfests while delivering clear

Qualifications

• Bachelor’s degree or higher in electrical engineering or related field.
• 3+ years of experience in high-speed signal integrity and channel validation.
• Experience with HFSS, Keysight ADS/PLTS or Cadence Sigrity or similar tools.

Responsibilities

• Own system-level SI analysis for high-speed channels including AEC/ACC/DAC connections and PCB interconnects.
• Develop end-to-end channels for 112G and 224G PAM4 applications.
• Develop and analyze S-parameter models; correlate simulations with measurements.
• Perform IBIS-AMI and statistical/electrical simulations for PAM4 channels.
• Lead BER, eye, jitter and SNR analysis; identify channel limitations.
• Correlate simulations with VNA, TDR, and oscilloscope data across modules.
• Troubleshoot SI issues across PCB, connector, cable, package, and silicon interfaces.
• Collaborate with ASIC/PHY, hardware, PCB, and validation teams; support demonstrations.
• Create technical reports and present results to customers and internal teams.
• Lead root-cause investigations and propose design improvements.

Skills

High-speed signal integrity

PAM4 signaling

S-parameters

Jitter analysis

BER analysis

Equalization

Python

MATLAB

Education

Bachelor's or Master's degree in Electrical Engineering or related field

Tools

HFSS

Keysight ADS/PLTS

Cadence Sigrity

Job description

Molex is offering a highly visible role for a Signal Integrity Systems Engineer, and you will design leading-edge solutions for the data services industry, influence next-generation active cable platforms using innovative chips in coordination with engineers from various disciplines.

You will also work closely with our Hyperscale customers and marketing teams to understand the customer’s application needs and translate them into best-in-class winning solutions. You may also spend firsthand time on Molex lab facilities and deliver innovative development solutions supporting our products and driving revenue.

Our Team

Molex, a subsidiary of Koch Industries, creates connectivity solutions that enable technologies to transform the future and improve lives. With operations in more than 40 countries, Molex offers connectivity products, services, and solutions for the data communications, medical, industrial, automotive, and consumer electronics industries. We do more than develop customer solutions—we create connections for life.

Molex is looking for a Signal Integrity Systems Engineer to support and develop Active cable designs for Hyperscalers. Our business is witnessing tremendous growth owing to an increasing need for Artificial Intelligence and data transfer rates. You will be working under leadership that has been setting and driving industry standards in data centers for more than 30 years.

What You Will Do

• 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 statistical/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.

Who You Are (Basic Qualifications)

• Bachelor’s or master’s degree in electrical engineering, Electrical & Computer Engineering, or related field.
• 3+ years of experience in high-speed signal integrity, channel modeling, or system validation.
• Good understanding of high-speed SerDes, PAM4 signaling, 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.

What Will Put You Ahead

• Hands-on experience with VNA, TDR/TDT, high-speed oscilloscopes, and BERTs.
• Experience working with S-parameter data and channel models.
• Experience with Python, MATLAB, or similar scripting environments for SI data analysis.
• Experience with 112G/224G PAM4 or similar high-speed SerDes.
• Experience with AEC/ACC/DAC cables and high-speed connectors.
• Experience with IBIS-AMI modeling and simulation.
• Understanding of IEEE, OIF, and/or relevant industry specifications.
• Experience with CMIS, QSFP, OSFP, or other pluggable optical/electrical interfaces.
• Experience correlating simulation models with physical measurements.
• Experience with automated SI data processing using Python.
• Strong problem-solving and cross-functional communication skills.
• Analyze Tx/Rx equalization, including CTLE, FFE, DFE, and re-timer/re-driver behavior.

This position does not qualify for VISA Sponsorship.

For this role, we anticipate paying $100,000 - $150,000 per year. This role is eligible for variable pay, issued as a monetary bonus or in another form.

At Koch companies, we are entrepreneurs. This means we openly challenge the status quo, find new ways to create value and get rewarded for our individual contributions. Any compensation range provided for a role is an estimate determined by available market data. The actual amount may be higher or lower than the range provided considering each candidate's knowledge, skills, abilities, and geographic location. If you have questions, please speak to your recruiter about the flexibility and detail of our compensation philosophy.

Hiring Philosophy

All Koch companies value diversity of thought, perspectives, aptitudes, experiences, and backgrounds. We are Military Ready and Second Chance employers. Learn more about our hiring philosophy here .

Who We Are

As a Koch company, Molex is a leading supplier of connectors and interconnect components, driving innovation in electronics and supporting industries from automotive to health care and consumer to data communications. The thousands of innovators who work for Molex have made us a global electronics leader. Our experienced people, groundbreaking products and leading-edge technologies help us deliver a wider array of solutions to more markets than ever before.

At Koch, employees are empowered to do what they do best to make life better. Learn how our business philosophy helps employees unleash their potential while creating value for themselves and the company.

Our goal is for each employee, and their families, to live fulfilling and healthy lives. We provide essential resources and support to build and maintain physical, financial, and emotional strength - focusing on overall wellbeing so you can focus on what matters most. Our benefits plan includes - medical, dental, vision, flexible spending and health savings accounts, life insurance, ADD, disability, retirement, paid vacation/time off, educational assistance, and may also include infertility assistance, paid parental leave and adoption assistance. Specific eligibility criteria is set by the applicable Summary Plan Description, policy or guideline and benefits may vary by geographic region. If you have questions on what benefits apply to you, please speak to your recruiter.

Additionally, everyone has individual work and personal needs. We seek to enable the best work environment that helps you and the business work together to produce superior results.

Equal Opportunity Employer, including disability and protected veteran status. Except where prohibited by state law, some offers of employment are conditioned upon successfully passing a drug test. This employer uses E-Verify. Please click here for additional information. (For Illinois E-Verify information click here , aquí , or tu ).