Principal Engineer – Switch Systems Test Engineer

Coherent Corp.

Principal Engineer focused on standardizing Switch-based DVT test coverage for optical transceiver products. Collaborating with global design teams for evaluation and optimization of new technologies.

Posted 7/2/2026full-timeFremont • California • 🇺🇸 United StatesLead💰 $114,375 - $195,875 per yearWebsite

Tech Stack

Tools & technologies

PythonSQL

About the role

Key responsibilities & impact

Assist in the standardization and implementation of Switch-based DVT (XDVT) test coverage for all new 800G, 1.6T and future 3.2T optical transceiver products. This includes continuously defining the new test coverage and streamlining the XDVT submission, verification and data reporting process.
Coordinate on the global XDVT activities, and assist/advise on the XDVT failure analysis working closely with different design teams from all R/D sites.
Assist module design team/QA team for urgent optical transceiver evaluation, optimization and debugging on switches
Able to directly interface with Switch-vendor and DSP vendor for co-debugging on the very challenging link flap issues as part of joint efforts by cross-functional teams.
Co-develop the special module tuning/optimization algorithm on Switch-based setup for LPO and LRO products by collaborating with design teams, customers and/or switch vendors.
Establish the Switch-based knowledge base in three areas:
- Switch study/characterization as part of design guidance
- Switch-based product evaluation/optimization methodologies and lessons learned
- Issues found on customer switch systems: Lesson learned, corrective actions and suggested design improvement.
Work closely with Switch test engineer to bring up the new types of switches and have regular interaction with various switch vendors for co-debugging and feature request.
Need light travel to other sites to facilitate the implementation of the Switch-based test platform and standardize the XDVT execution.

Requirements

What you’ll need

B.S. EE degree with 9-year experience or M.S. EE degree with 7-year experience required
Strong programming skills with Python is preferred.
Familiar with optical transceiver product characterization, validation and failure analysis in Switch-based system
Familiar with or capable of quick learning on Switch OS, such as Sonic by MSFT, Cumulus by Nvidia and VEOS by Arista.
Experience in link performance optimization on Switch rack system in data center is a Plus.
Basic knowledge in IEEE standard in terms of test specs and test methodologies
Solid knowledge in PCBA, RF and Fiber optics is highly preferred
Strong laboratory optical and electrical measurement skills required
Hands-on experience in optical test instruments, such as DCA, OSA, BERT, etc., is a Must
Strong data analysis skills with SQL, JMP, MS Excel.
Strong skills in communication, presentation and documentation.

Benefits

Comp & perks

All employees are required to attend scheduled training, follow the site EHS procedures and Corporate EHS standards. This includes the use of proper protective equipment (PPE) as required by the job responsibilities.
Managers will ensure that all safety and environmental procedures are followed consistently. They will ensure that risk assessments are performed, proper training, work instructions, required PPE is available, and will monitor compliance.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Optical Transceiver CharacterizationLink Performance OptimizationData Analysis with SQLOptical Test InstrumentsProgramming in PythonPCBA KnowledgeRF KnowledgeFiber Optics KnowledgeLaboratory Measurement SkillsFailure Analysis

Soft Skills

Communication SkillsPresentation SkillsDocumentation Skills