Firmware Engineer - Optical Networking & RTOS

Lumentum Operations LLC; San Jose (CA); On-site; USD 112,000 - 160,000; Full time

Benefits offered by this job

Flexible time off

Health benefits

Tuition reimbursement

Gym access

Free coffee

Stock options

Innovative culture

Job summary

Lumentum Operations LLC in San Jose, CA, is seeking a Firmware Engineer to develop, test, and maintain embedded software for our optical products. You will work across the full firmware lifecycle to ensure high performance and reliability.

You will design and debug firmware for modules and transceivers, implement software for microcontrollers with real-time OS, and collaborate with hardware, manufacturing, and test teams to bring products to production.

Qualifications

• 3+ years of embedded firmware experience.
• Proficient in C/C++ for embedded systems.
• Experience with FreeRTOS or similar RTOS.
• Strong ARM Cortex-M/R MCU knowledge.
• Familiarity with I2C, SPI, UART, USB, Ethernet.
• Git version control experience.
• DSP or control systems knowledge is a plus.
• Excellent problem solving and communication skills.

Responsibilities

• Design, develop, and debug firmware for optical modules and transceivers.
• Implement embedded software for MCUs with real-time operating systems.
• Develop unit, integration, and system tests for firmware.
• Collaborate with hardware engineers to define firmware interfaces.
• Support production ramp‑up and debugging activities.
• Contribute to architecture discussions and design reviews.
• Analyze and resolve performance and stability issues.
• Document firmware designs and test plans.

Skills

Embedded firmware

C/C++

FreeRTOS

ARM Cortex-M

Peripheral interfaces

Git

DSP knowledge

Debugging tools

Education

Bachelor's degree

Master's degree

Electrical/Computer Engineering

Tools

Oscilloscopes

Logic analyzers

In-circuit debuggers

Git

Job description

Lumentum Operations LLC in San Jose, CA, is seeking a Firmware Engineer to develop, test, and maintain embedded software for our optical products. You will work across the full firmware lifecycle to ensure high performance and reliability.

You will design and debug firmware for modules and transceivers, implement software for microcontrollers with real-time OS, and collaborate with hardware, manufacturing, and test teams to bring products to production.