Principal EPI Design Engineer — VCSEL & III‑V Growth Lead

Lumentum Operations LLC; Wayne (CA); On-site; USD 135,000 - 193,000; Full time

Benefits offered by this job

Flexible time off

Health and wellness benefits

Tuition reimbursement

Gym facilities

Free coffee/tea

Employee stock options

Job summary

Lumentum Operations LLC is seeking a highly qualified PhD in optoelectronics for an epitaxial growth-focused role in California. You will work with device designers to craft growth recipes for III/V materials and ensure high-yield wafer processing.

Strong data analysis and cross-functional leadership are essential. Responsibilities include translating designs into EPI recipes, coordinating with internal/external growers, and reviewing calibration data to drive design improvements.

Qualifications

• PhD in optoelectronics or related field with industry experience.
• Hands-on MBE or MOCVD growth of III/V materials; GaAs VCSEL preferred.
• Experience with PL, Reflectance, SIMS, XRD, ECV profiling.
• Knowledge of device physics, laser testing, wafer processing.
• Proficient data analysis in Python/Matlab; strong communication skills.

Responsibilities

• Coordinate with device designers to develop epitaxial growth recipes.
• Translate designs into EPI growth recipes and coordinate with growers.
• Review calibration data and feedback to optimize EPI designs.
• Launch process runs with wafer processing and integration teams.
• Analyze wafer processing and reliability data to inform EPI improvements.
• Coordinate analyses (SIMS, TEM, EDX) for performance insights.
• Contribute IP ideas for novel device designs.

Skills

Cross-functional teamwork

Verbal and written communication

Data analysis

Education

PhD in optoelectronics or related major

Tools

Python

Matlab

Excel

JMP

Minitab

Job description

Lumentum Operations LLC is seeking a highly qualified PhD in optoelectronics for an epitaxial growth-focused role in California. You will work with device designers to craft growth recipes for III/V materials and ensure high-yield wafer processing.

Strong data analysis and cross-functional leadership are essential. Responsibilities include translating designs into EPI recipes, coordinating with internal/external growers, and reviewing calibration data to drive design improvements.