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This range is provided by Lumilens. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.
Base pay range
$210,000.00/yr - $250,000.00/yr
Principal Firmware Engineer
SAN JOSE, CA / HYBRID
About Lumilens
At Lumilens we are building the critical photonics infrastructure that powers tomorrow’s AI supercomputing. From chip-to-chip optical interconnects to scalable photonic engines, Lumilens is unlocking a new era of computing—faster, cooler, and massively more efficient.
We’re a well-funded startup backed by Mayfield and led by veterans who’ve built and scaled some of the most transformative technologies in the industry. This isn’t incremental innovation—it’s a ground-floor opportunity to rethink the optical layer from the silicon up. You’ll work alongside a team of world-class engineers solving some of the hardest challenges in optics, systems, and scale. Every line of code, every design decision, every breakthrough you help deliver—will shape the infrastructure of tomorrow.
If you're looking for mission, momentum, and the chance to make an outsized impact—jump on the rocket ship. We’re just getting started.
Position Overview
We are seeking an experienced technical leader to join our growing team and lead development of the embedded software for our high-speed fiber optical transceiver products. This position will work closely with other transceiver engineering disciplines for requirements analysis, design, implementation, and test of embedded software for our fiber optic transceiver products. You will work with our technical teams and help us to deliver our family of optical transceiver solutions to the market.
Key Responsibilities
- Lead software design, development and code reviews
- Develop high-quality C code in a real-time embedded environment
- Work with the cross functional teams to design, implement, & test embedded SW solutions
- Specify, design, implement, and test functionality and behaviors of embedded subsystems, including:
- Communication protocols using I2C/I3C interfaces
- Configuration of Microcontrollers, DSPs and Photonics components.
- State machines for system control, optical calibrations and data flow management. and data flow management.
- CMIS (Common Management Interface Specification) compliance
- Provide technical leadership for software developers and mentor engineers on the team
- Participate in hands-on hardware bring-up, troubleshooting and failure analysis
Required Qualifications
- Bachelor’s degree in Electrical Engineering, Computer Engineering, or related field
- 10+ years of experience in embedded software development
- Strong proficiency in C and Python programming languages
- Experience with real-time operating systems (e.g., FreeRTOS)
- Experience with CMIS (Common Management Interface Specification)
- Ability to read and understand schematic diagrams
What we offer
- Competitive salary commensurate with experience Comprehensive benefits package including health insurance
- Professional development opportunities and certification support
- Access to cutting-edge technology and cloud platforms
- Collaborative work environment with cross-functional teams
- Lumilens is an equal opportunity employer. All qualified applicants will receive consideration without regard to race, color, religion, gender, identity, orientation, veteran status, disability, or any other legally protected status.
Seniority level
Seniority level
Mid-Senior level
Employment type
Employment type
Full-time
Job function
Industries
Robotics Engineering, Engineering Services, and Data Infrastructure and Analytics
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Inferred from the description for this job
Medical insurance
Vision insurance
401(k)
Paid maternity leave
Paid paternity leave
Disability insurance
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