Firmware Development Engineer - Optoelectronics

Molex is seeking a Firmware Engineer to join our Optical Solutions business unit in Fremont, CA.

In this early career role, you'll be part of a multidisciplinary engineering team responsible for developing embedded software for next-generation optical transceivers.

You'll contribute to the design, implementation, and testing of firmware that controls high-speed photonic devices, ensuring performance, reliability, and compliance with industry standards.

Occasional travel may be required for collaboration with global teams or participation in customer or industry events (approximately 10-15%).

What You Will Do


* Develop and maintain embedded firmware for optical transceiver modules (QSFP-DD, OSFP, etc.)


* Implement I2C/MDIO communication protocols and monitor/control interfaces


* Collaborate with hardware, signal integrity, and test teams to validate firmware functionality


* Assist in debugging and troubleshooting firmware issues using logic analyzers, oscilloscopes, and protocol analyzers


* Support firmware integration with host systems and participate in interoperability testing


* Document firmware architecture, APIs, and test procedures

Who You Are (Basic Qualifications)


* Bachelor's degree in Electrical Engineering, Computer Engineering, Information Technology, or a related field preferred


* Solid understanding of embedded C/C++ programming


* Familiarity with microcontrollers, RTOS concepts, and low-level hardware interfaces


* Exposure to I2C, SPI, UART, or other serial communication protocols


* Basic knowledge of optical communication principles is a plus


* Demonstrated problem-solving skills, curiosity, and a desire to grow professionally.

You'll be supported by experienced mentors and have opportunities to expand your technical expertise.


* Excellent communication and teamwork abilities


* This role is not eligible for visa sponsorship

For this role, we anticipate paying $80,000 - $130,000 per year.

This role is eligible for variable pay, issued as a monetary bonus or in another form.

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