Silicon Test Engineer
Lumilens
- Location
- Onsite (San Jose, California)
- Employment
- Full-time
- Level
- Senior Level
About the Role
Lumilens is a San Jose-based startup building photonic interconnect solutions for AI data centers. This role involves developing and optimizing silicon test solutions for photonics and semiconductor products across characterization, wafer sort, and final test to ensure high quality and efficient manufacturing.
Skills
Benefits
- Health insurance
Full job details
The Role
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.
What You’ll Do
Test Development & Execution
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
Test Optimization & Yield Improvement
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
Cross-Functional Collaboration
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
Test Infrastructure & Hardware
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
What We’re Looking For
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
What We Offer
Competitive compensation commensurate with experience
Comprehensive health benefits
Exposure to cutting-edge photonics technology and advanced manufacturing environments
Opportunity to work closely with cross-functional teams across engineering, product, and operations
A collaborative environment where individual contributors can make a direct and measurable impact
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.