Molex

Your Job

Molex is seeking a Senior Firmware Engineer to join our Optical Solution Business Unit (OSBU). In this role the successful candidate will be part of a world-class engineering team, contributing to the development of the next generation coherent and PAM4 optical transceivers. The successful candidate will be responsible for designing, implementing, and validating embedded firmware that ensures the functionality, performance, and reliability of our high-speed optical transceiver modules. The Senior Firmware Engineer will apply deep expertise in embedded systems, real-time programming, and hardware/software integration while collaborating closely with global, cross-functional teams to develop high-performance firmware solutions.

Our Team

R&D Optoelectronic Solutions

What You Will Do

• Design, develop, and optimize embedded firmware for high-speed optical transceiver modules (e.g., QSFP-DD, OSFP)
• Collaborate with hardware, optics, and systems teams to define and implement firmware requirements
• Perform bring-up and debugging of firmware on new hardware platforms using lab equipment
• Implement and validate digital control interfaces such as I²C, SPI, MDIO, and CMIS-compliant protocols.
• Support validation, manufacturing, and production teams by providing firmware diagnostics and test features
• Contribute to firmware architecture, documentation, code reviews, and continuous integration efforts

Who You Are (Basic Qualifications)

• Bachelor’s degree in Electrical Engineering, Computer Engineering, or related field
• 5+ years of experience in embedded firmware development
• Proficiency in embedded C/C++, RTOS, and hardware debugging tools (oscilloscopes, logic analyzers, etc.)
• Hands-on experience with DSP, TIA/drivers, modulators, photodetectors, and laser control
• Familiar with industry standards such as MSA, CMIS, and IEEE 802.3
• Excellent problem-solving skills and ability to work in a fast-paced, cross-functional team environment

What Will Put You Ahead

• Master’s or Ph.D. degree
• Proven expertise in 800G/1.6T optical transceiver design and development
• Experience with scripting languages (e.g., Python, Perl) for test automation and validation

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.

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.

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