Senior Signal Integrity (SI) Engineer (m,f,d), Bièvres

Senior Signal Integrity (SI) Engineer (m,f,d) Location(s)

As a Signal Integrity (SI) Engineer, you will operate at the critical intersection of mechanical precision and electrical excellence. You will drive the development of next-generation interconnect solutions—including

USB-C, HFM, HSAL-G and HS-Max

—utilizing advanced 3D Electromagnetic (EM) simulation and high-frequency laboratory characterization. Your mission is to ensure Molex products deliver uncompromising signal integrity within the most demanding automotive and data center environments.

Our Team You will be part of Global Signal Integrity team that’s based out of Asia, North America and Europe, Molex is a global leader in providing the connectivity backbones of the modern world. In this role, you aren't just placing components; you are architecting the hardware that makes autonomous driving and hyperscale computing possible. You will collaborate with global experts in:

Automotive High-Speed Links:

Designing the high speed data driven system for self-driving vehicles.

Next-Gen Protocols:

Shaping the future of Automotive Ethernet and SerDes architectures.

Advanced Material Science:

Exploring how dielectric properties and exotic plating’s influence on high-frequency performance.

What You Will Do 1. 3D EM Simulation&Virtual Prototyping

Full-Wave Modeling:

Develop high-fidelity 3D models of connectors and cable terminations using

Ansys HFSS

or

CST Studio Suite .

Optimization:

Conduct "what-if" analyses on mechanical variables—such as pin geometry and shield spacing—to optimize impedance, return loss, and crosstalk.

Impedance Control:

Identify and mitigate discontinuities within the connector pin-field and mating interfaces.

High-Frequency Measurement:

Utilize

VNAs

and

TDRs

to characterize physical prototypes at frequencies of

20 GHz and beyond .

Advanced De-embedding:

Apply

AFR, TRL, or 2xThru

de-embedding techniques to isolate connector performance from test fixture interference.

Correlation:

Close the loop between virtual models and physical reality by validating simulation accuracy against empirical lab data.

3. Crosstalk Discovery&Mitigation

Aggressor-Victim Analysis:

Perform deep-dive simulations to identify primary crosstalk contributors in high-density arrays.

Noise Calculation:

Evaluate

ICN (Integrated Crosstalk Noise)

and Power Sum Crosstalk against

IEEE 802.3

or

OIF-CEI

standards.

Pin-Map Optimization:

Recommend optimized signal-to-ground ratios and G-S-S-G patterns to maximize isolation.

Scripting:

Leverage

Python

or

MATLAB

to automate the processing of massive Touchstone ($sNp$) datasets.

Compliance:

Ensure designs meet or exceed industry specifications, including USB4, USCAR-2, LV214, Open Alliance, Automotive Ethernet and other standards.

Who You Are (Basic Qualifications) Education&Experience Requirements:

PhD

in Electrical Engineering, Physics, or Computer Engineering (RF/Microwave focus) +

5 years

of experience.

Master’s Degree

in a related field +

up to 8 years

of experience.

Bachelor’s Degree

in a related field +

8 to 10 years

of professional experience.

Core Competencies:

Analytical Rigor:

A deep-seated desire to understand the "why" behind signal degradation and electromagnetic phenomena.

Communication:

The ability to translate complex EM theory into actionable design guidance for mechanical teams and stakeholders.

Mobility:

Willingness to travel up to 25% to support global projects.

What Will Put You Ahead

Expertise in

Transmission Line Theory , S-parameters, and Smith Charts.

Mastery of simulation suites ( Ansys HFSS, SI-Wave, ADS, CST ).

Experience with

Python

(NumPy, Pandas, Matplotlib) for SI data analytics.

Practical experience in

EMC/EMI testing

and high-speed hardware debugging.

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.

Fremont, California | Fremont, California

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