Functional Test Engineer

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 Functional test engineer  located in Austin, TX.

Reporting to the Test Engineering Manager, the Functional test engineer will serve as a key technical lead and individual contributor for a new liquid-cooled server rack product line. They will drive launch and ongoing support of high-power AI/ML, GPU, and hardware accelerator-based server, storage, and networking platforms featuring advanced liquid cooling. This role owns test process development for full rack (L6,10/L11) assembly and integration—ensuring quality, performance, and safety—across NPI and sustaining production. They will design procedures, automate test execution, analyze data for continuous improvement, and leverage liquid cooling expertise to deliver robust end-customer solutions.

What a typical day looks like:

• Performing hands-on debugging, validation, and system-level failure analysis of next-generation server and rack systems within a high-mix, high-ambiguity manufacturing environment.
• Strong Linux CLI proficiency, hardware integration expertise, and advanced troubleshooting skills across L6, and L10, test stages. Ability to train others on Linux basics.
• System architecture understanding, how liquid cooling integrates with overall system testing.
• Intermediate programming in Bash and Python.
• Familiarity with liquid cooling components (pumps, radiators, cold plates, chillers, reservoirs, tubing, fittings, coolants).
• Leak detection/prevention techniques and best practices.

Essential Duties & Responsibilities

• Test Development & Execution
• Liquid Cooling
• Failure Analysis & Debugging
• Automation & Data Analysis
• Continuous Improvement
• Technical Leadership & Training
• Cross-Functional Collaboration
• Reporting & Communication
• Safety & Compliance

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

• Bachelor’s degree in CS, CE, EE/Electronics, or related field (MSEE or advanced degree preferred).
• 6-8 years of hands-on experience in failure analysis and system-level testing within a high-paced manufacturing environment.
• Proficiency in scripting languages (Python, Bash), advanced Linux command-line operations, and hardware/network troubleshooting including the ability to train others on Linux fundamentals.
• Expertise in computer and server hardware/software integration, diagnostics, and repair -particularly within a manufacturing or high-level assembly environment
• Experience with DAQs and sensors (thermocouples, flow meters, pressure sensors).
• Strong knowledge of statistical analysis and its application to data-driven troubleshooting and decision-making

BO18

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 06-18-2026 Job Posting End Date 08-28-2026 Job CategoryProduction Engineering

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 [email protected] 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).