Silicon Test Engineer

Lumilens•San Jose, CA

About The Position

As a Silicon Test Engineer, you will be responsible for developing and executing test solutions for Lumilens’ silicon photonics and semiconductor products. You will work across characterization, wafer sort, and final test to ensure robust coverage, high product quality, and efficient manufacturing at scale. This is a hands-on role focused on building and optimizing test infrastructure, working closely with design, product, and operations teams to enable successful product ramps and ongoing production performance.

Requirements

8–12+ years of experience in semiconductor or silicon photonics test engineering
Strong experience with ATE platforms such as Advantest 93K and/or Teradyne
Background in silicon validation, production test, DFT/DFM, and high-speed or mixed-signal testing
Experience optimizing test time, coverage, yield, and cost in a manufacturing environment
Proficiency in scripting/programming (C/C++, Python, or similar) and Linux-based environments
Strong analytical and problem-solving skills, with an ability to work through complex technical challenges
Comfortable working cross-functionally in a fast-paced, evolving environment

Responsibilities

Develop and implement silicon test solutions from characterization through wafer sort and final test
Create and maintain ATE test programs on platforms such as Advantest 93K and/or Teradyne
Translate design and DFT requirements into scalable, production-ready test solutions
Support new product introduction (NPI) and ensure smooth transition into high-volume manufacturing
Optimize test flows to improve coverage, reduce test time, and lower cost of test
Analyze yield and test data to identify trends and drive continuous improvement
Debug test failures and identify root causes across product, test, and process
Strengthen screening coverage to ensure only high-quality devices ship to customers
Partner closely with design, product, and process engineering teams to ensure testability is built in early
Support test plan reviews and collaborate on coverage, performance, and reliability requirements
Work with operations teams to ensure test readiness for production ramps
Contribute to development of high-speed test hardware and interfaces for photonics devices
Ensure test solutions meet performance requirements for high-speed and mixed-signal applications
Support improvements in test methodologies as product complexity increases