Firmware Development Engineer - Optoelectronics

Remote, USA
Posted Jun 13, 2026
Full-time

Molex is seeking a Firmware Engineer to join their Optical Solutions business unit. In this role, you will develop embedded software for next-generation optical transceivers, contributing to the design, implementation, and testing of firmware that ensures performance and compliance with industry standards.

Responsibilities

  • 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

Skills

  • 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
  • Excellent communication and teamwork abilities
  • This role is not eligible for visa sponsorship

Benefits

  • Medical
  • Dental
  • Vision
  • Flexible spending and health savings accounts
  • Life insurance
  • ADD
  • Disability
  • Retirement
  • Paid vacation/time off
  • Educational assistance
  • Infertility assistance
  • Paid parental leave
  • Adoption assistance

Company Overview

  • Molex supplies electronic interconnect solutions and connectivity products for a broad range of industries. It is a sub-organization of Koch, Inc.. It was founded in 1938, and is headquartered in Lisle, Illinois, USA, with a workforce of 10001+ employees. Its website is http://www.molex.com.

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