Software Development Engineer – System Simulation & Digital Twin Platforms, Optical Solutions

Molex is a global leader in the optical industry, renowned for delivering high-performance, field-proven wavelength management solutions.

Our expertise spans components, modules, integrated line-cards, and chassis, with a strong focus on innovation, miniaturization, and manufacturing automation.

Our advanced optical, mechanical, electrical, and software design capabilities support the evolving needs of high-density, high-bandwidth, and flexible optical networks across telecom, datacom, hyperscale datacenters, artificial intelligence, and supercomputing.

We are seeking a Software Development Engineer to join our Optical Line Systems (OLS) Product Development team with a primary focus on large-scale system simulation and digital twin platforms.

This role emphasizes building scalable simulation environments that model complex optical network behavior without reliance on physical hardware.

AI and LLM-based techniques are used as enablers on top of simulation, rather than being the primary focus.

You will develop hardware-independent simulation platforms that support system validation, what-if analysis, and accelerated development cycles-forming the foundation for future AI-assisted and autonomous workflows.

This role can be based in the United States and Canada with travel to our Fremont office and global regions.

What You Will Do



* Design and develop large-scale system simulation frameworks and digital twins for optical network systems.


* Build hardware-independent simulation environments to support software validation, system-level testing, and failure analysis.


* Model complex, distributed system behaviors and interactions.


* Enable simulation-driven validation for DVT/SVT and system integration testing.


* Integrate simulation platforms into CI/CD and automated validation workflows.


* Collaborate with system, validation, and test teams to translate real-world issues into simulation models.


* Leverage AI/LLM techniques to assist with simulation orchestration, analysis, and insight generation when applicable.


* Ensure high code quality, scalability, and maintainability of simulation platforms.

Who You Are (Basic Qualifications)



* Master's or PhD in Computer Science, Software Engineering, Electrical Engineering, or related field with strong system focus


* At least 5 years of hands-on software development experience in system simulation, modeling, or complex software platforms


* Experience designing large-scale system simulation frameworks


* Experience building simulation environments to support software validation, system-level testing, and failure analysis


* Strong proficiency in Python and software development for data- and compute-intensive systems.


* Experience building production-quality simulation or modeling software.


* Solid software engineering fundamentals: testing, version control, documentation, and maintainable design.


* Must have experience working ...