Principal R&D Laser EPI Design Engineer

Lumentum International (Thailand); San Jose (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 on site

Free coffee/tea

Stock options and incentive plans

Collaborative, inclusive culture

Job summary

Lumentum is a leader in optical and photonic solutions. The role focuses on epitaxial growth (EPI) design for III/V semiconductors, aligning growth with wafer processing and device design for high yield. Candidates should hold a PhD in optoelectronics and have hands-on MBE/MOCVD experience, plus strong data analysis skills.

Collaborative, cross-functional teams drive NPI and reliability analysis; opportunities include IP generation and career growth in a cutting-edge environment.

Qualifications

• PhD degree in optoelectronics or other relevant major with industry experience is minimum requirement.
• Experience with MBE or MOCVD growth of III/V semiconductor material, preferred GaAs VCSEL devices.
• Experience with semiconductor wafer analysis techniques such as PL, Reflectance, SIMS, XRD, ECV profiling.
• Knowledge of semiconductor device physics, laser diode testing and wafer process technology.
• Experience with data analysis tools (Excel, JMP, Minitab) and processing (Python, Matlab).
• Excellent ability to work in cross-functional teams and strong communication skills.

Responsibilities

• Coordinate with device designers to develop epitaxial growth recipes for performance targets.
• Translate designs into EPI growth recipes and manage internal or external growers.
• Review calibration data and feedback into EPI design improvements.
• Launch process runs with wafer process integration teams and analyze reliability data.
• Coordinate EPI-related analyses (SIMS, TEM, EDX) for performance understanding.
• Generate IP for novel ideas in device design or EPI designs.

Skills

MBE/MOCVD growth

GaAs VCSEL devices

Data analysis

Python

Matlab

Cross-functional teamwork

Communication skills

Education

PhD in optoelectronics

Tools

Excel

JMP

Minitab

XRD

SIMS

ECV profiling

Job description

It's fun to work in a company where people truly BELIEVE in what they're doing! We're committed to bringing passion and customer focus to the business.

If you like wild growth and working with happy, enthusiastic over-achievers, you'll enjoy your career with us!

About Lumentum

At Lumentum, we're building the tech behind the world's fastest networks and most advanced systems. Our optical and photonic solutions power everything from AI and cloud computing to data centers, telecom, and advanced manufacturing.

We're a global team of innovators working where light meets technology, solving big challenges that keep the world connected and moving forward. If shaping the future of connectivity excites you, you'll fit right in.

What You'll Be Doing

• Coordinate with device designers to develop the epitaxial growth recipes needed for the devices to meet the wide range of performance requirements including output power, drive voltage, beam characteristics, wavelength, high-speed operation and reliability
• EPI design includes, but is not limited to, modeling design inputs such as layer thicknesses and compositions, doping profiles, active regions, growth conditions to outputs such as mode profiles, beam divergence and electrical resistance.
• EPI designs must align with the wafer processing and device design technology with high yield
• Translate designs into EPI growth recipes and interact with internal EPI growers or manage external vendors to execute the growths
• For each growth campaign review all available calibration and EPI characterization data and feedback to internal or external growers or modify EPI designs as needed
• Work with device designers and wafer process integration teams to launch process runs. Support NPI team to analyze all critical wafer processing, device testing and reliability data to feedback to EPI design improvements
• Coordinate any special EPI related analysis to understand performance and reliability such as SIMS, TEM, EDX
• Generate key intellectual property (IP) for novel ideas in device design or EPI designs

What We're Looking For

Education: PhD degree in optoelectronics or other relevant major with industry experience is minimum requirement

Experience:

Core Requirements

• PhD degree in optoelectronics or other relevant major with industry experience is minimum requirement
• Hands-on experience with MBE or MOCVD growth of III/V semiconductor material, preferred experience with GaAs based VCSEL devices
• Experience with semiconductor wafer analysis such as photoluminescence (PL), Reflectance spectrum, EPI defects and haze scans, X-Ray diffraction (XRD), SIMS, ECV profiling
• Knowledge of semiconductor device physics, laser diode testing and wafer process technology
• Experience with software data analysis tools (such as Excel, JMP, Minitab) and data processing (Python, Matlab)
• Excellent ability to work in cross-functional teams as both a team leader and a contributor
• Strong verbal and written communication skills

Preferred Qualifications

• Experience with VCSEL devices
• Experience with device modeling and device simulation
• Strong communication skills

Perks You’ll Love

• Flexible time off
• Health and wellness benefits (physical and mental)
• Tuition reimbursement and career growth support
• A workplace built for you: free gym, games room, prayer room
• Subsidized meals, free coffee/tea
• Employee stock options and incentive plans
• A collaborative, innovative, and inclusive culture

Join a Team That’s Shaping the Future

At Lumentum, we're more than just a workplace-we're a launchpad for creativity and innovation. We're committed to celebrating your unique talents and helping you grow. Our guiding principles-Innovate, Engage, Deliver, Excel, and Win-aren't just words; they're the heart of what we do.

Let's Build a Brighter Future Together!

We're committed to building an inclusive workplace where everyone feels valued and empowered. We welcome applicants from all backgrounds and provide accommodations for individuals with disabilities throughout the hiring process. Your uniqueness makes us stronger, sparks creativity, and drives our success.

Please contact us at [e-mail] to request accommodation.

Join us-your future starts here!

Pay Range:

P70-USA-1 :$134,750.00 - $192,500.00 Disclaimer: Final base salary for the successful candidate will depend on multiple factors, including but not limited to, job location, where work will be performed, qualifications, work history and relevant experience. With our continual goal of making Lumentum a best place to work for our employees, we strive to offer employees competitive total compensation packages, which may include annual bonus, commission for certain sales roles, equity, and health and welfare benefits.