New

Optical Transceiver Test Engineer

Molex
life insurance, parental leave
United States, California, Fremont
Nov 11, 2026
Molex possesses a rich heritage in the optical industry. We provide the highest performing and field-proven wavelength management solutions, from components and modules to integrated line-cards. Continuous innovation in passive component function integration, miniaturization, and manufacturing automation, cutting edge WSS and amplify technology and comprehensive optical, mechanical, electrical and software integration capabilities enable us to serve the needs of high-density, high-bandwidth, and flexible optical networks. Molex is rapidly growing in our Opto-E business, responsible for developing 1.6T, 3.2T and beyond. In our Fremont office, we have a dedicated team of engineers. We are looking for a Test Engineer that will lead test development for high-speed fiber optic 800G/1.6T/3.2T transceiver characterization from early prototypes, engineering samples, EVT/DVT testing to pilot production test definitions. This Engineer will closely collaborate with design authority, hardware and firmware team leaders to develop module calibration algorithms for transmitters and receivers. As the only manufacturer in North America, this person will have an impact on our high-speed optical interconnects and the growth of the company. What You Will Do Device and module characterization for next generation optical transceivers for AI/ML applications. These will be used in AI/ML scale-out and scale up networks. Working with transceiver module design authority to implement test definitions Implement the hardware and software of test platforms designed by test engineering group for early engineering samples, EVT/DVT, and pilot productions. Perform preliminary test data analysis and summarization for wider development team to performance gap analysis Test support for failure mode analysis for failures from R&D and production phases. Who You Are (Basic Qualifications) Bachelor's /Master's in Electrical Engineering or related engineering discipline. Coursework or practical experience in one or more of the following: digital communications theory, digital signal processing, circuit theory and electromagnetism theory Configure and operate oscilloscopes, optical power meters, power supplies, temperature equipment, and other laboratory instruments. Develop and maintain Python scripts for instrument control, data collection, data processing, and report generation. Execute test plans for engineering samples, EVT/DVT builds, and pilot-production units. Document test setups, procedures, software revisions, instrument settings, and results. Troubleshoot test setup, hardware, firmware, and measurement issues with senior engineers. Support correlation and repeatability studies across test stations. Follow laboratory safety and ESD procedures. What Will Put You Ahead Previous experience in test instrument automation with python scripts Experience in automated charting, data analysis using python Proficient use of oscilloscopes, power supplies and common laboratory equipment such as digital multimeters, temperature sensors etc. Internship, academic project, or laboratory experience involving automated measurements Familiarity with optical transmitters, receivers, lasers, photodiodes, or optical power measurement Exposure to IC, UART, or SPI Familiarity with NumPy, pandas, Matplotlib, Jupyter, Git, or similar engineering tools Exposure to high-speed digital communications or PAM4 testing For this role, we anticipate paying $140,000 - $165,000 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 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).