Flex

Functional Test Engineer

Flex$90K — $120K *
Technical Services
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's in CS, CE, EE/Electronics or related field; advanced degree preferred.
  • 6-8 years of hands-on experience in failure analysis and system-level testing.
  • Proficient in Python and Bash scripting, with strong Linux command-line skills.
  • Expertise in computer and server hardware/software integration and diagnostics.
  • Experience with DAQs and sensors (thermocouples, flow meters, pressure sensors).
  • Strong statistical analysis knowledge for data-driven decision-making.

Responsibilities

  • Develop and execute testing processes for new liquid-cooled server products.
  • Conduct failure analysis and debugging in a high-mix manufacturing environment.
  • Utilize liquid cooling knowledge to support overall system testing.
  • Automate testing procedures and analyze data for insights.
  • Promote continuous improvement initiatives based on testing outcomes.
  • Provide technical leadership and training to team members.
  • Collaborate cross-functionally to enhance product quality and safety.

Benefits

  • Complete medical, dental, and vision coverage.
  • Life insurance provided.
  • Short-term and long-term disability insurance.
  • 401(k) matching contributions.
  • Paid vacation and sick time.
  • Tuition reimbursement for further education.
Full Job Description
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 Category
Production Engineering

Is Sponsorship Available?
No

About Flex

Flex Ltd. is an American Singaporean-domiciled multinational electronics contract manufacturer. It is the third largest global electronics manufacturing services (EMS), original design manufacturer (ODM) company by revenue, behind only Pegatron for what concerns original equipment manufacturers. Flex has manufacturing operations in over 30 countries, totaling approximately 200,000 employees.
Learn more about Flex
Size
172,648 employees
Market Cap
$9.7 billion
Industry
Net Income
$421 million
Founded
2016
5 Year Trend
+1.8%
Revenue
$23.3 billion
NASDAQ

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