
Real job — pulled straight from Coherent Corp’s careers page · Verified September 17, 2026 · No reposts.
Job description
Coherent Corp is hiring a Principal Test Engineer — a full-time, based in Dong Nai, Vietnam role. Apply directly on Coherent Corp's careers page below.
Principal Engineer, Test
Location: Dong Nai, Vietnam
Primary Duties & Responsibilities
- 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.
- Mature fault isolation, problem solving & analytical skills
Small team management/leadership experience is mandatory, able to lead local test team.
Education & Experience
- Bachelor's degree or above, major in Electronic Information Engineering, Communication Engineering, Optoelectronic Information Science and Engineering, Automation or other related majors
Skills
- 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
Working Conditions
- This role is 100% onsite / hybrid / remote
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
About Us
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.
Main job responsibilities include improving production line test yield, optimizing test items, analyzing and improving defective products on the production line, conducting analysis on customer-returned RMA products, verifying new test environments and solutions, cooperating with PE to reduce HPU,leading local test team,support stable mass production delivery.
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Frequently asked questions
What skills are required for Principal Test Engineer at Coherent Corp?
The required skills for Principal Test Engineer at Coherent Corp include: Problem Solving, English, Mandarin.
What is the seniority level for Principal Test Engineer at Coherent Corp?
Principal Test Engineer at Coherent Corp is a Principal level position.
How do I apply for Principal Test Engineer at Coherent Corp?
You can view the full description and apply for Principal Test Engineer at Coherent Corp on EchoJobs: https://echojobs.io/job/coherent-corp-principal-engineer-test-hgvba.



