Get new jobs for this search by email

18 hours ago Be among the first 25 applicants

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

Referrals increase your chances of interviewing at Lumilens by 2x

Inferred from the description for this job

Medical insurance

Vision insurance

401(k)

Paid maternity leave

Paid paternity leave

Disability insurance

Get notified about new Firmware Engineer jobs in San Jose, CA .

Mountain View, CA $125,400.00-$188,100.00 1 day ago

Mountain View, CA $145,000.00-$170,000.00 17 hours ago

Mountain View, CA $167,000.00-$228,000.00 2 weeks ago

Software Engineer, AI Platform - New Grad

Sunnyvale, CA $117,000.00-$173,000.00 2 weeks ago

Software Engineer (L4), Content & Business Products

New Grads 2025 - General Software Engineer

San Jose, CA $120,000.00-$165,000.00 5 months ago

Software Engineer, AI Intern (Fall 2025)

San Francisco Bay Area $57.00-$61.00 3 weeks ago

Santa Clara, CA $185,000.00-$225,000.00 1 day ago

New Grads 2025 - Software Engineer, Algorithm

San Jose, CA $120,000.00-$165,000.00 9 months ago

Mountain View, CA $120,000.00-$140,000.00 2 months ago

Software Engineer (L5) - Open Connect Platform

Mountain View, CA $125,000.00-$253,000.00 2 months ago

Santa Clara, CA $146,307.00-$166,900.00 4 days ago

Mountain View, CA $167,200.00-$250,800.00 2 weeks ago

Software Engineer III, Embedded Systems/Firmware, Platforms Infrastructure Engineering

Sunnyvale, CA $141,000.00-$202,000.00 2 weeks ago

San Jose, CA $146,600.00-$203,100.00 1 week ago

Pleasanton, CA $150,000.00-$250,000.00 1 year ago

Mountain View, CA $128,000.00-$160,000.00 1 month ago

Pleasanton, CA $150,000.00-$250,000.00 2 years ago

Mountain View, CA $125,000.00-$188,000.00 1 week ago

San Jose, CA $113,400.00-$206,300.00 3 weeks ago

Mountain View, CA $167,000.00-$250,000.00 2 days ago

We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.