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

Flex intends to spin off its Cloud and Power Infrastructure segment into a new, independent publicly traded company, which we’re calling SpinCo, until the name is unveiled. The spin is planned for Q1 2027. If the intended spin occurs, this role will support SpinCo, which will focus on critical digital infrastructure, delivering end-to-end power and thermal management solutions for AI data centers and other mission-critical applications.

To support our extraordinary teams who build great products and contribute to our growth, we’re looking to add a Test Engineer located in Guadalajara, North Campus.

Reporting to the Test Engineer Manager the Test Engineer is responsible for directing and coordinating electronic engineering and technical personnel involved in the design, fabrication, integration, and execution of testing systems, test control equipment, and software-based test solutions. The role supports functional and system integration testing of complex electronic and power systems in a manufacturing and NPI environment.

What a typical day looks like:

• Directs and/or coordinates electronic engineering and technical personnel in the execution and support of testing systems, test control apparatus, equipment, and software/system testing in a manufacturing environment.
• Leads electronic engineering activities related to the deployment, installation, calibration, verification, and use of test instruments, equipment, and control devices required to validate product functionality and capture accurate test data.
• Performs and supports functional testing with a strong emphasis on system integration testing of assembled electronic and power systems.
• Interfaces and collaborates closely with scientific, engineering, manufacturing, and technical teams to diagnose and resolve system‑level issues, including product malfunctions, yield losses, incomplete test data, data interpretation challenges, or software-related problems.
• Evaluates and interprets test data to identify failure modes and prepares technical reports used by electronic engineering, software engineering, operations, management, and customer teams.
• Develops, modifies, or utilizes existing software and hardware tools to support automated or semi‑automated functional and integration testing.
• Uses programming languages such as Python and PHP to support test automation, data analysis, and troubleshooting activities.
• Provides technical leadership and daily floor support to a team of approximately 20 test technicians, including training on test hardware, software, and structured problem‑solving methodologies.
• Drives test yield improvement by performing root cause analysis, coordinating corrective actions, and monitoring sustainable improvements.
• Performs and supports equipment verification, commissioning, and integration in production lines.
• Creates, maintains, and updates test and process documentation in alignment with Flex and customer requirements.
• Supports AI rack integration projects, including electrical validation and system‑level functional testing.
• Works directly with power electronics and three‑phase systems during system integration and troubleshooting activities.
• Provides hands‑on technical support during New Product Introduction (NPI) phases.
• Maintains ongoing written and verbal communication with customers and internal cross‑functional teams.
• Supports flexible schedules as required by production and project needs.

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

• BA/BS in Electronics, Mechatronics or similar.
• Senior-level experience focused on functional testing, system integration, and troubleshooting within a manufacturing environment.
• Strong practical knowledge of power electronics and three‑phase systems.
• Programming experience using Python, PHP, or similar languages, mainly applied to test support and automation.
• Proven experience leading or coordinating technical teams; direct management of test technicians is required.
• Strong analytical and problem‑solving skills, including root cause analysis and yield improvement.
• Experience supporting NPI activities (strong plus).
• Ability to communicate effectively with internal stakeholders and customers, both written and verbal.
• Strong organizational skills and comfort working in fast‑paced production environments.
• Availability of schedule and willingness to travel as required.

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

• Competitive Salary.
• Life & Medical insurance.
• Christmas Bonus.
• Food Coupons.
• Saving Fund.
• Life Insurance.

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Job Category

Required Skills:

Optional Skills:

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).