Principal Engineer (NPI)

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📍 Dong Nai, VietnamFull time

About this role

Primary Duties & Responsibilities

  • Responsible for production test process optimization of 800G/1.6T optical modules, driving improvement of test efficiency and product yield.

  • Lead anomaly analysis and improvement plan formulation during optical module production testing, and track the implementation effect of improvement measures

  • Responsible for failure analysis of RMA (Return Merchandise Authorization) optical module products, output root cause reports and promote issue closure.

  • Be responsible for other test-related matters, including but not limited to: verification of new test plans, verification of new test environments, assisting PE in handling product-related issues, etc.
     

Education & Experience

  • Bachelor's degree or above, major in Electronic Information Engineering, Communication Engineering, Optoelectronic Information Science and Engineering, Automation or other related majors
  • 9+ years of relevant testing experience in optical modules, priority given to those familiar with the testing process of optical communication products, Experience in 800G/1.6T optical module testing is preferred
  • Experience in optical module production yield improvement and test process optimization projects, able to independently lead the implementation of improvement projects.

     

Skills

  • Small team management/leadership experience is mandatory.
  • Experience in well-developed fault isolation, problem solving & analytical skills.
  • Experience in methodisation and improvement of manufacturing processes.
  • Ability to use English Chinese for Business Communication. 
     

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.

Culture Commitment

Ensure adherence to company’s values (ICARE) in all aspects of your position at Coherent Corp.:

Integrity – Create an Environment of Trust

Collaboration – Innovate Through the Sharing of Ideas

Accountability – Own the Process and the Outcome

Respect – Recognize the Value in Everyone

Enthusiasm – Find a Sense of Purpose in Work


 

Coherent Corp. is an equal opportunity/affirmative action employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by law.

Coherent is a global leader in lasers, engineered materials and networking components. We are a vertically integrated manufacturing company that develops innovative products for diversified applications in the industrial, optical communications, military, life sciences, semiconductor equipment, and consumer markets. Coherent provides a comprehensive career development platform within an environment that challenges employees to perform at their best, while rewarding excellence and hard-work through a competitive compensation program. It's an exciting opportunity to work for a company that offers stability, longevity and growth. Come Join Us!

Note to recruiters and employment agencies: We will not pay for unsolicited resumes from recruiters and employment agencies unless we have a signed agreement and have required assistance, in writing, for a specific opening.


Frequently Asked Questions

Is the salary disclosed for the Principal Engineer (NPI) position at Coherent Corp. US?
The salary for this Principal Engineer (NPI) role at Coherent Corp. US is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the Principal Engineer (NPI) position at Coherent Corp. US located?
This Principal Engineer (NPI) role at Coherent Corp. US is based in Dong Nai, Vietnam. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the Principal Engineer (NPI) role at Coherent Corp. US full-time or part-time?
This is listed as a Full time position. It is posted as a Principal Engineer (NPI) role at Coherent Corp. US.
How do I apply for the Principal Engineer (NPI) position at Coherent Corp. US?
Click the "Apply Now" button on this page. You will be redirected to Coherent Corp. US's official application portal hosted on oraclecloud where you can submit your application directly.
When was the Principal Engineer (NPI) job at Coherent Corp. US posted?
This Principal Engineer (NPI) position at Coherent Corp. US was posted on Aug 9, 2026. Apply as soon as possible — early applications are often reviewed first.
Principal Engineer (NPI)
Coherent Corp. US
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