Firmware Engineer Jobs in San Jose, CA

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About Lumentum

At Lumentum, we’re building the tech behind the world’s fastest networks and most advanced systems. Our optical and photonic solutions power everything from AI and cloud computing to data centers, telecom, and advanced manufacturing.

We’re a global team of innovators working where light meets technology, solving big challenges that keep the world connected and moving forward. If shaping the future of connectivity excites you, you’ll fit right in.

Why You’ll Love This Role

As a Firmware Engineer at Lumentum Operations LLC, you will be instrumental in developing, testing, and maintaining embedded software for our cutting-edge optical products. This role involves working across the full firmware development lifecycle to ensure high-performance and reliable operation of our devices.

What You’ll Be Doing

• Design, develop, and debug firmware for new and existing optical modules, transceivers, and other Lumentum products.
• Implement embedded software for microcontrollers and other embedded systems, focusing on real-time operating systems and internal operation systems.
• Develop and execute comprehensive unit, integration, and system tests to ensure firmware quality and robustness.
• Work closely with hardware engineers during the design phase to define firmware requirements and interfaces.
• Work closely with manufacturing and test engineering teams to support product bring-up, debug, and production ramp-up.
• Contribute to architecture discussions and design reviews, providing expert input on firmware solutions.
• Analyze and resolve complex firmware issues, including performance bottlenecks and stability problems.
• Document firmware designs, specifications, and test plans to maintain clear and concise records.
• Stay current with industry trends and emerging technologies in embedded systems and optical networking.

What We’re Looking For

Education:
Bachelor's or Master's degree in Electrical Engineering, Computer Engineering, Computer Science, or a related field.

Experience:
Core Requirements:

• 3+ years of experience in embedded firmware development, preferably in the optical networking or telecommunications industry.
• Proficiency in C/C++ programming for embedded systems.
• Experience with bare-metal and real-time operating systems such as FreeRTOS, or similar.
• Strong understanding of microcontroller architectures (e.g., ARM Cortex-M/R based) and peripheral interfaces (I2C, SPI, UART, USB, Ethernet).
• Familiarity with hardware/software co-design and debugging tools (oscilloscopes, logic analyzers, in-circuit debuggers).
• Experience with version control systems (e.g., Git).
• Knowledge of digital signal processing (DSP) or control systems is a plus.
• Excellent problem-solving skills and attention to detail.
• Ability to work independently and as part of a collaborative team.
• Strong written and verbal communication skills.

Perks You’ll Love

• Flexible time off
• Health and wellness benefits (physical and mental)
• Tuition reimbursement and career growth support
• A workplace built for you: free gym, games room, prayer room
• Subsidized meals, free coffee/tea
• Employee stock options and incentive plans
• A collaborative, innovative, and inclusive culture

Join a Team That’s Shaping the Future

At Lumentum, we’re more than just a workplace—we’re a launchpad for creativity and innovation. We’re committed to celebrating your unique talents and helping you grow. Our guiding principles—Innovate, Engage, Deliver, Excel, and Win—aren’t just words; they’re the heart of what we do.

Let’s Build a Brighter Future Together!

We’re committed to building an inclusive workplace where everyone feels valued and empowered. We welcome applicants from all backgrounds and provide accommodations for individuals with disabilities throughout the hiring process. Your uniqueness makes us stronger, sparks creativity, and drives our success.

Please contact us at talentacquisition@lumentum.com to request accommodation.

Join us—your future starts here!

Pay Range:

Disclaimer:

Final base salary for the successful candidate will depend on multiple factors, including but not limited to, job location, where work will be performed, qualifications, work history and relevant experience. With our continual goal of making Lumentum a best place to work for our employees, we strive to offer employees competitive total compensation packages, which may include annual bonus, commission for certain sales roles, equity, and health and welfare benefits.