Flex is the diversified manufacturing partner of choice that helps market-leading brands design, build and deliver innovative products that improve the world.

A career at Flex offers the opportunity to make a difference and invest in your growth in a respectful, inclusive, and collaborative environment. If you are excited about a role but don't meet every bullet point, we encourage you to apply and join us to create the extraordinary.

Job Summary

To support our extraordinary teams who build great products and contribute to our growth, we’re looking to add a/an Principal Field Applications Engineer located in California.

Reporting to the Director, Field Applications the Principal Field Applications Engineer will be accountable for providing technical guidance and information to customers on a pre-sales and post-sales basis to enable delivery of design, fabrication, and assembly goals, per customers’ expectations.

What a typical day looks like:

Provide best in class support by closing customer technical support questions related to manufacturing capabilities, including design, fabrication and assembly abilities.
Provide hands on lab support (in Flex or the customer lab) locally, which could range from 10% to 60% of the time, depending on customer needs/design cycles.
Review customer requirements, identify and communicate potential issues and provide best fit solutions matching Flex capability and customers’ specifications.
Contribute to development of complex product roadmaps by providing field feedback to the design teams.
Define initial project/product scope and prepare project plans to meet customers’ expectations.
Develop and present technical seminars for customers and sales personnel to promote employer's manufacturing capabilities, services, available technologies, manufacturing process and quality.
Prepare and maintain required documentation.

The experience we’re looking to add to our team,

5+ years of experience directly working with analog circuit design/troubleshooting required
Bachelor’s degree in Electronics (or a closely related field) highly preferred, OR equivalent experience
Technically competent in the analog/mixed signal design to be able to solve product and system level complex issues
Technically competent in a lab set up to test, characterize, and emulate customer issues with Flex products and complex customer boards

EC37

What you'll receive for the great work you provide:

Full range of medical, dental, and vision plans
Life Insurance
Short-term and Long-term Disability
Matching 401(k) Contributions
Vacation and Paid Sick Time
Tuition Reimbursement

Application Deadline:

Applications for this job position will be accepted for at least five days following the job posting start date below and continuing until the end date below or until the position is filled. This posting may close sooner due to application volume.

Job Posting Start Date 08-19-2026 Job Posting End Date 10-19-2026



The base pay range for this position is provided below. The final base rate offered will be determined using job-related, non-discriminatory criteria, including but not limited to experience, qualifications, geographic location, education, external market data, and internal equity.

$153,500.00 USD - $211,000.00 USD Annual

Job Category

Design, Process & Technology Engineering

Is Sponsorship Available?

Flex is an Equal Opportunity Employer and employment selection decisions are based on merit, qualifications, and abilities. We do not discriminate based on: age, race, religion, color, sex, national origin, marital status, sexual orientation, gender identity, veteran status, disability, pregnancy status, or any other status protected by law. We're happy to provide reasonable accommodations to those with a disability for assistance in the application process. Please email accessibility@flex.com and we'll discuss your specific situation and next steps (NOTE: this email does not accept or consider resumes or applications. This is only for disability assistance. To be considered for a position at Flex, you must complete the application process first).

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