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Lead Engineer, Test

Coherent Đồng Nai Province, Vietnam

onsite
Posted Aug 19, 2026
  • Role & seniority

    • Optical module Production Test / Test Engineering (mid-to-senior)

    • 7+ years relevant testing experience required

  • Stack/tools (implied)

    • Optical module production testing processes for 100G/200G/400G/800G

    • Anomaly analysis, root-cause analysis, failure analysis workflows

    • Test plan / test environment verification and validation

    • Business communication in English and Chinese

  • Top 3 responsibilities

    • Optimize production test process for optical modules (100G/200G/400G/800G) to improve test efficiency and yield

    • Lead anomaly analysis during testing and define/track improvement plans

    • Conduct RMA failure analysis, produce root-cause reports, and drive issue closure

  • Must-have skills

    • Strong fault isolation, problem-solving, and analytical skills

    • Experience with manufacturing/process methodization and improvement

    • Prior experience in optical module production testing; ability to communicate in English/Chinese for business

  • Nice-to-haves

    • Experience specifically with 400G/800G/1.6T optical module testing
  • Location & work type

    • 100% onsite (specific site not provided)

Full Description

Primary Duties & Responsibilities

  • Responsible for production test process optimization of 100G/200G/400G/800G 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.
  • More than 7 years of relevant testing experience in optical modules, priority given to those familiar with the testing process of optical communication products, Experience in 400G/800G/1.6T optical module testing is preferred.

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

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.

Production test process optimizationOptical module testingAnomaly analysisFailure analysisRMA processingRoot cause analysisTest plan verificationTest environment verificationManufacturing process improvementProblem solvingAnalytical skillsCommunication engineeringElectronic information engineeringAutomationBusiness communication

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