Optical Engineer

Your Job

We are seeking an experienced Optical Engineer to support Co-Packaged Optics (CPO) test and validation activities. The role will own test concept development, test-fixture and setup design, test execution, data analysis, and technical communication with cross-functional teams and customers. The ideal candidate has hands-on experience with fiber- and free-space-optical test methods, strong opto-mechanical intuition, and excellent communication skills.

Our Team

Molex possesses a rich heritage in the optical industry. We provide the highest performing and field-proven wavelength management solutions, from components and modules to integrated line-cards. Continuous innovation in passive component function integration, miniaturization, and manufacturing automation, cutting edge WSS and amplification technology and comprehensive optical, mechanical, electrical and software design capabilities enable us to serve the needs of high-density, high-bandwidth, and flexible optical networks of telecom, datacom, hyperscale datacenter and supercomputing.

What You Will Do

• 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; work cross-functionally to implement corrective actions and design-for-test improvements.
• Prepare clear technical documentation (test plans, procedures, reports) and present results to program leadership and customers.

Core Competencies

• Strong experimental troubleshooting and hands-on lab skills.
• Ability to translate test requirements into practical, robust test setups and repeatable procedures.
• Analytical mindset with basic signal processing/statistics for optical data interpretation.
• Attention to detail and rigorous documentation practices.
• Collaborative communicator who can simplify complex results for non-specialists and engage effectively with customers.

Working Environment & Expectations

• Onsite position (5 days/week) in Fremont, CA - regular lab-based work and close in-person collaboration with cross-functional teams.
• Hands-on work in optical labs and clean bench areas; must follow established safety and calibration procedures.
• Occasional customer-facing activities, technical reviews, or technology demonstration.

Who You Are (Basic Qualification)

• BS in Optical Engineering, Physics, Applied Physics, EE, or related physical sciences.
• 3+ years hands-on experience in optical testing and characterization (fiber and/or free-space).
• Practical experience with fiber and free-space optic device test methods and common optical metrics (IL, RL, PDL, OSNR, etc.).
• 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.
• Able to work onsite in Fremont, CA; occasional travel as required.

What Will Put You Ahead

• MS in Optical Engineering, Physics, Applied Physics, EE, or related physical sciences
• Experience specifically in CPO, optical packaging, or photonics test engineering.
• Hands-on free-space alignment, beam profiling, interferometry, or opto-mechanical fixture design experience.
• Scripting/coding for test automation and analysis (Python, MATLAB, LabVIEW) - able to develop/reuse instrument-control scripts and data pipelines.
• Project management experience: tracking milestones, coordinating cross-functional tasks, and driving to deliverables.
• Exposure to reliability testing environments (thermal cycling, vibration) or electro-optical co-design constraints.