Optical Test Engineer

Department: Engineering

Location: San Jose

Employment Type: FullTime

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. At Lumilens, we’re developing high-speed photonics products purpose-built to power the future of AI infrastructure and high-performance computing.

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 scaling optical systems. 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.

About the Role – Optical Product Test Engineer

As an Optical Product Test Engineer, you will play a vital role in validating and ensuring the quality of Lumilens’ photonic components, modules, and systems. This position combines hands-on production testing with test development and reporting, supporting both new product introduction (NPI) and volume manufacturing.

You will collaborate closely with the optical design, hardware, and manufacturing teams to calibrate, characterize, and troubleshoot next-generation photonics technologies that will drive tomorrow’s AI and HPC infrastructure.

Primary Duties & Responsibilities

• Perform characterization and testing of fiber optic components and modules

• Analyze test results to ensure compliance with performance specifications and quality standards

• Maintain accurate, detailed records of test procedures and outcomes

• Generate comprehensive test reports for internal and external stakeholders

• Support troubleshooting and root cause analysis to resolve product issues

• Design, plan, and conduct optical and fiber testing on components, devices, and systems

• Collaborate with cross-functional engineering teams to support NPI and manufacturing ramp

Education & Experience

• BS or MS in Engineering, Physics, Optics, or a related technical field

• 8+ years of industry experience in optical or fiber component testing preferred

• Prior exposure to photonics, telecom, or high-speed networking systems is a plus

Skills

• Hands-on experience with optical test instruments (e.g., optical spectrum analyzers, power meters, polarization controllers, bit-error-rate testers)

• Familiarity with communication interfaces and test automation tools

• Ability to write or adapt scripts for automation (Python, LabVIEW, Visual Basic; Shell scripting a plus)

• Strong analytical skills to interpret complex test data and identify patterns or anomalies

• Resourceful problem-solver with ability to apply knowledge creatively to test challenges

• Capable of managing multiple test projects and priorities in a fast-paced environment

• Strong communication and documentation skills; able to train and mentor peers when needed

What We Offer

• Competitive salary commensurate with experience

• Comprehensive benefits package, including health insurance

• Professional development and certification opportunities

• Access to cutting-edge optical/photonics test environments and tools

• A collaborative, cross-functional team dedicated to solving some of the hardest challenges in photonics

• 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