Coherent

Principal Design Engineer

Coherent • $130K — $180K *
Fremont, CA 94536In-Person
Telecommunications & Hardware
8 - 10 years of experience
Today
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Job Overview by Ladders

Qualifications

  • PhD with 10+ years of relevant experience
  • Expertise in optoelectronic device design and simulation
  • Experience in photodiode epi materials growth and quality control
  • Knowledge of photodiode wafer front and back-end processes
  • Background in photodiode testing and reliability qualification

Responsibilities

  • Lead design, simulation, and optimization of high-speed InGaAs/InP photodiodes
  • Define device architecture and performance targets for market requirements
  • Collaborate with engineers to optimize fabrication processes
  • Analyze device performance and improve speed and reliability
  • Develop characterization plans with test engineers to validate performance
  • Work with fabrication teams to scale manufacturing technologies
  • Mentor junior engineers and lead cross-functional teams

Benefits

  • On-site working environment in Fremont, CA
  • Opportunities for mentorship and leadership
  • Exposure to advanced manufacturing technologies and innovation
  • Participation in continuous improvement processes
  • Access to emerging technologies and industry trends
Full Job Description
Job Description

Primary Duties & Responsibilities
  • Lead the design, simulation, development, and optimization of high-speed, high-sensitivity InGaAs/InP photodiodes for advanced optoelectronic applications.
  • Define device architecture and performance targets to meet demanding customer and market requirements.
  • Partner with epitaxial growth and semiconductor process engineers to develop and optimize device structures and fabrication processes.
  • Analyze device performance through simulation, characterization, and failure analysis to continuously improve speed, sensitivity, reliability, and manufacturability.
  • Collaborate with test and reliability engineers to develop characterization plans, validate device performance, and ensure long-term product reliability.
  • Work closely with internal wafer fabrication teams and external manufacturing partners to develop and scale advanced manufacturing technologies.
  • Lead technical problem-solving efforts throughout the product development lifecycle, from concept through production release.
  • Drive innovation by identifying and implementing new photodiode structures, materials, and fabrication techniques.
  • Mentor junior engineers and provide technical leadership across cross-functional development teams.
  • Stay current with emerging technologies, industry trends, and scientific advancements in photonic device design. You will lead the design and product development of high-speed and high-sensitive InGaAs /InP photodiodes

Education & Experience
  • PhD with 10+ years of relevant experience
  • Optoelectronic device design and simulation
  • Photodiode epi materials growth, development and quality control
  • Photodiode wafer front process and backend process.
  • Photodiode test and characterization.
  • Photodiode reliability qualification.

Skills
  • Lead the architectural designs of high-speed and high-sensitive InGaAs / InP photodiodes
  • Design high-speed and high-sensitive photodiode epi structures
  • Design both front- and back-end wafer process flows
  • Support and Perform device characterization
  • Support product qualification and release

Working Conditions
  • This role will be based on-site in Fremont, CA.
  • Regular use of a computer and other office equipment is necessary.

Physical Requirements
  • Sitting for extended periods while working on a computer or in meetings.
  • Use of hands and fingers for typing, writing, and handling documents.
  • Occasional lifting of objects or materials up to 20 pounds for administrative tasks.
  • Ability to communicate verbally and in writing.

Safety Requirements

All employees are required to follow the site EHS procedures and Coherent Corp. Corporate EHS standards.

Quality and Environmental Responsibilities

Depending on location, this position may be responsible for the execution and maintenance of the ISO 9000, 9001, 14001 and/or other applicable standards that may apply to the relevant roles and responsibilities within the Quality Management System and Environmental Management System.

About Coherent

Coherent, Inc. is a global leader in providing laser-based solutions to a broad range of commercial and scientific research customers. The company designs, manufactures, and markets lasers, laser-based systems, precision optics, and related accessories for a diverse group of customers. Coherent's markets include scientific research, OEM components and instrumentation, microelectronics, materials processing, and life sciences. The company's products are used in a wide range of applications. Coherent was founded in 1966 and is headquartered in Santa Clara, California.
Learn more about Coherent
Size
5,085 employees
Market Cap
$4.6 billion
Industry
Manufacturing & Automotive
Net Income
-$419.7 million
Founded
1966
5 Year Trend
+27.8%
Revenue
$1.2 billion
NASDAQ
COHR
* Ladders Estimates

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