Junior Optoelectronics / Hardware Engineer Trainee

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

Join a multidisciplinary team working on innovative in-vitro diagnostic (IVD) systems based on optical and fluorescence detection technologies. As a Junior Optoelectronics / Hardware Engineering Trainee, you will contribute to the development of optoelectronic architectures, including light excitation, optical path, and signal detection.

What a typical day looks like:

• Support design and development of optoelectronic systems for fluorescence-based devices.
• Contribute to excitation source selection (LED vs laser, wavelength matching, stability).
• Assist optical chain definition (filters, dichroic mirrors, lenses).
• Support sensor and detection electronics (photodiodes, CMOS, APD, PMT exposure).
• Participate in lab activities (optical measurements, SNR evaluation, debugging).
• Contribute to signal acquisition and basic processing (ADC, filtering, calibration).
• Collaborate with hardware, firmware, mechanical, and system engineers.
• Prepare technical documentation and reports.
• Participate in design reviews.

Here is some of what you'll need:

• Bachelor or Master in Electronic, Biomedical, or Optoelectronics Engineering.
• Basic knowledge of analog electronics and sensors.
• Interest in optical systems or photonics.
• Familiarity with lab instruments (oscilloscope, DAQ).
• Interest in medical devices and IVD technologies.
• Strong curiosity and teamwork attitude.
• Good English and Italian.

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

• 6 month Internship program (plus 6 month renewable)
• Hands-on experience on real medical devices with optical technologies
• Mentoring from senior engineers
• Exposure to full product development lifecycle
• Collaborative international environment
• Growth path toward Hardware/Optoelectronics Engineer role.

The starting pay level offered for this intern role is 1000 EUR per month plus daily lunch vouchers 8 Euro/each.

EB05

Job Category
Design, Process & Technology Engineering

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 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).

Client-provided location(s): Milan, Italy

Job ID: Flex-WD220146

Employment Type: FULL_TIME

Posted: 2026-04-30T20:02:05