Failure Analysis Engineer

Overview

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 are a well funded startup backed by Mayfield and led by veterans who have built and scaled transformative technologies. Lumilens is developing high speed photonics products purpose built to power the future of AI infrastructure and high performance computing. This is a ground floor opportunity to rethink the optical layer from the silicon up, with a team of world class engineers solving hard challenges in scaling optical systems. If you are looking for mission, momentum, and the chance to make an outsized impact, join us on the rocket ship.

Position Overview

As a Failure Analysis Engineer at Lumilens, you will play a critical role in ensuring the reliability and performance of our advanced optical transceiver products. You will lead the investigation of optical, electrical, and mechanical failures from field deployments or production testing, using schematics, test equipment, and fault isolation techniques to identify root causes and drive corrective actions. You will partner closely with R D, supplier quality, and production teams, document findings, assess field risks, and communicate insights that directly influence product design and manufacturing improvements. This role also involves developing new test infrastructure, writing automation scripts for customer switches, and occasionally engaging directly with customers on technical inquiries. It is a highly collaborative, hands on position at the intersection of engineering, quality, and innovation. This role is ideal for someone passionate about problem solving and driving continuous improvement in cutting edge optical technologies.

Duties/Responsibilities

Responsible for optical, mechanical and electrical analysis troubleshooting of optical transceivers returned from field deployment or internal testing.

Troubleshoot failures using schematics, test equipment, switches, fault isolation techniques, and Design of Experiments

Work with cross functional teams including supplier quality engineers to determine root cause and appropriate corrective actions

Thorough documentation of all test and failure analysis results, including photographs, test data, and repair work

Interface with production databases to extract original shipment information, test data, and traceability information

Assess field risk based on understanding of failure modes and field data utilizing available reliability tools

Analyze and present periodic updates on failure analysis progress and reliability estimates to R D, corporate teams, and customers

Engage in discussion with customers and respond to direct technical inquiries

Bring up new internal and external test infrastructure to validate failure signatures observed in customer environments

Develop test scripts to operate and report data from customer switches

Experience in datacenter architecture is a plus

Skills/Experience

Minimum 5 year experience in related field. Experience in transceiver module tests at 400G, 800G, 1.6T, etc., is preferred.

BS/MS in physics, electrical or mechanical engineering or other relevant field or equivalent experience

Extensive knowledge of and experience working with analog and digital circuits

Familiar with MSA and customer standards requirements

Familiar with basic failure analysis techniques methodologies

Strong device physics background

Fundamental understanding of OSA assembly and its peripheral circuits

Knowledge of OSA assemblies, PCBA, and module manufacturing processes is an added advantage

Working knowledge of device characterization and its techniques

Strong data analysis skills

Excellent verbal and written communication skills

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, ancestry, age, physical or mental disability, medical condition, genetic information, military and veteran status, marital status, pregnancy, gender, gender expression, gender identity, sexual orientation, or any other characteristic protected by local law, regulation, or ordinance.

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