Optical Test Engineer – CPO Modules & Fiber/Free-Space

Molex; Fremont (CA); On-site; USD 130,000 - 160,000; Full time

Job summary

Molex is seeking an experienced Optical Engineer in Fremont, CA to support Co-Packaged Optics (CPO) test and validation activities. You will own test concepts, design fixtures, execute measurements, and analyze data, collaborating with cross-functional teams and customers.

The role requires hands-on optical testing experience (fiber and free-space), strong opto-mechanical intuition, and clear communication skills.

Qualifications

• BS in Optical Engineering, Physics, EE or related
• 3+ years hands-on experience in optical testing and characterization (fiber and/or free-space)
• Proficiency with optical lab equipment: OSA, optical power meters, BERTs, alignment stages, fiber handling tools
• Strong written and verbal communication skills; able to present technical results to cross-functional teams and customers

Responsibilities

• Develop and own test concepts and measurement plans for CPO modules, optical engines, and related fiber/free-space subsystems
• Design, build, and validate optical test setups and fixtures (fiber coupling, alignment stages, free-space benches, fiber interfaces)
• Execute hands-on measurements and characterize devices: insertion loss, return loss, PDL, crosstalk, extinction ratio, OSNR, eye diagrams, and other relevant optical metrics
• Automate test sequences and data collection (scripting for instrument control, logging, basic analysis)
• Analyze test data, perform statistical and signal-processing analysis, and summarize technical findings
• Troubleshoot test and integration issues; implement corrective actions and design-for-test improvements
• Prepare clear technical documentation (test plans, procedures, reports) and present results to program leadership and customers

Skills

Test planning

Measurement & data analysis

Optical testing

Fiber & free-space testing

Documentation skills

Education

BS in Optical Engineering, Physics, EE

Tools

OSA

Power meters

BERTs

Alignment stages

Fiber handling tools

Job description

Molex is seeking an experienced Optical Engineer in Fremont, CA to support Co-Packaged Optics (CPO) test and validation activities. You will own test concepts, design fixtures, execute measurements, and analyze data, collaborating with cross-functional teams and customers.

The role requires hands-on optical testing experience (fiber and free-space), strong opto-mechanical intuition, and clear communication skills.