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Optical System Test Engineer

Molex
life insurance, parental leave
United States, California, Fremont
Oct 28, 2025

Your Job

We're seeking a dedicated Optical System Test Engineer to join our Fremont team and support the OLS (Optical Line System) program. This is a hands-on role focused on L0 optical control testing, software functionality validation, and coordination of all test activities. You'll serve as the local interface with our offshore test development team, ensuring efficient collaboration with the global OLS design and test teams.

Our Team

Molex possesses a rich heritage in the optical industry. We provide the highest performing and field-proven wavelength management solutions from components, modules to integrated line-cards. Continuous innovation in passive component function integration, miniaturization, and manufacturing automation, cutting edge WSS and amplification technology and comprehensive optical, mechanical, electrical and software design capabilities enable us to serve the needs of high-density, high-bandwidth, and flexible optical networks of telecom, datacom, hyperscale datacenter and supercomputing.

We serve global clients in telecom and datacom industries in providing innovative optical modules and subsystems to support our customer's next generation networks. We are hiring a Staff Optical System Test Engineer to join our team. This person will be responsible for testing our optical DWDM network. This role is critical to the advancement of our next phases in product development.

What You Will Do

  • Own the end-to-end OLS optical testing and validation process, including final DVT, customer demo systems, and customer field mirror systems.
  • Develop and execute test plans for L0 optical control and software functionality, transforming requirements into actionable test cases.
  • Coordinate all local test activities and act as the primary point of contact for the offshore test development team.
  • Support automation development to streamline workflows and provide hands-on lab support for configuring and maintaining testbeds.
  • Assist with customer demos, GUI validation, and provide onsite support for cross-functional teams.
  • Collect and analyze hardware, optics, and software data generated during testing, using statistical methods to identify trends, anomalies, and defects.

Who You Are (Basic Qualifications)

  • Bachelor's degree in Telecommunication, Electrical Engineering, Physics, or Optics.
  • 5+ years in optical line system integration and optical networking testing.
  • 3+ years in test development and automation for optical long-haul or metro systems
  • Working knowledge of optical modules (WSS, OCM, DGE, EDFA, Raman, OTDR) and lab equipment (OSA, optical power meter, VOA, Optical Switch, ASE light source, TLS, Oscilloscope).
  • Hands-on lab experience with optical line system installation and bring-up.
  • Scripting experience for test automation in Python.
  • Experience translating customer specifications into system test cases and plans.

What Will Put You Ahead

  • Master's or Doctoral degree in Optical Networking (preferred).
  • Fluency in Chinese

For this role, we anticipate paying $130,000 - $180,000 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 Benefits

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 Opportunities

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, aqui, or tu).

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