Job Posting Start Date 02-25-2026 Job Posting End Date

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

The Principal Applications Engineer will be based in **San Jose, CA **reporting to the **Director, Global Field Application Engineering.**The Applications Engineer will be accountable for providing technical guidance and design-in help to customers on a post-sales basis to enable delivery of design, fabrication, and assembly goals, per customers’ expectations.

What a Typical Day Looks Like:

• Uses technical knowledge of products and associated development tools to assist customers on complex issues.

• Conducts complex qualification/verification testing onsite (local labs) and coordinates closely with design engineering to solve any issues and deliver results on time. The onsite part can be 50-75% of the time (the rest of the time would be remote/work from home).

• Develops and maintains close relationships to work very closely with internal engineering and business development teams.

• Build close relationships with the customer technical teams to work and collaborate closely with them.

• Provides technical expertise during product development by defining/conveying customer product needs and translating these needs into new product recommendations and specifications.

• Reviews customer requirements, identifies and communicates potential issues and provides recommendations that will meet both the capabilities Flex and the specifications of the customer.

• Creates clarity: identifies and clearly communicates existing and potential design issues both internally and externally.

• Coordinates product integration efforts between component suppliers, Flex, and the customer.

• Develops and presents technical seminars for customers and Field Application Engineers to promote employers' manufacturing capabilities, services, available technologies, manufacturing process and quality.

• Provides best in class, complex, technical assistance by answering and closing all customer and program management technical questions related to manufacturing capabilities including design, fabrication, and assembly abilities.

• Defines initial project/product scope and prepares project plans to meet customers' expectations.

• Prepares detailed project plans by documenting customers' requirements and incorporating design and manufacturing capabilities to meet customers’ expectations.

• Prepares and maintains required documentation.

• May be required to sit at customer site (locally) for prolonged periods of time.

The Experience We’re Looking to Add to Our Team:

• Bachelor's degree in electrical engineering (master's preferred).

• 8+ years of design and/or applications engineering experience in the power conversion area (dc-dc conversion preferred).

• Demonstrates detailed expertise in complex functional/technical area with a deep understanding of power electronics and power conversion considerations.

• Is extremely comfortable in the lab environment and can expertly conduct verification/qualification testing for extended periods of time at the (local) lab/s.

• Provides key technical support to mid-large customers promptly.

• Executes and provides input to functional strategic plans and objectives for the group/site.

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

Pay Range (Applicable to California)

$150,000.00 USD - $206,300.00 USD Annual

Job Category

Design, Process & Technology Engineering

Relocation: Not eligible

Is Sponsorship Available?

No

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).