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.

• 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.

• 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 in manufacturing/production industry.

• Experience with digital twins, simulation-driven testing, or system modeling tools.
• Exposure to AI/ML or LLMs applied to analysis or automation.
• Background in networking, telecom, optical systems, or large-scale infrastructure.
• Familiarity with CI/CD pipelines, containers, or cloud-native environments.
• Interest in enabling AI-assisted and autonomous system validation.

For this role, we anticipate paying $170,000 - $250,000 per year. This role is eligible for variable pay, issued as a monetary bonus or in another form.

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.