Senior Test Development Engineer
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About us
Plessey has a long history of innovation. Founded in 1956, we have evolved from one of Europe’s earliest semiconductor pioneers into the world’s most advanced MicroLED specialist. Over the decades, Plessey has built a first class, fully integrated platform designing, manufacturing, and engineering next-generation display technologies entirely in-house. This end to end capability, combined with our strong IP portfolio, uniquely positions us to lead the scaling of MicroLEDs from lab innovation to high-volume production.
Our future is even brighter. We believe MicroLEDs will define the next era of technology—powering ultra-efficient AR/VR displays, driving optical processors that make AI faster and more sustainable, and enabling devices yet to be imagined. With our unique expertise and talented team, we are positioned to lead this transformation.
It’s an exciting time to join us: Plessey has recently been acquired by Haylo Labs, accelerating our growth and opening new opportunities.
Our Values
- Innovation
- Collaboration
- Commitment
- Care
Location
Located at our head office and state-of-the-art fabrication facility in Plymouth.
About the Role
We are looking for an experienced Test Development Engineer to join our team. In this role, you will work with advanced test equipment, including Teradyne UltraFLEX and J750 systems, helping to develop and improve innovative testing solutions. If you are passionate about test development, enjoy solving complex problems, and want to work with cutting-edge technology, we would love to hear from you.
Key Responsibilities
- Implement and maintain digital and mixed-signal test solutions.
- Specify hardware required for testing such as probecards, interface boards etc.
- Develop and optimise test programs for complex devices using Teradyne Ultraflex and J750 systems.
- Perform test program, Test HW characterization over temperature (Ex. Shmoo analysis), GRR, Correlation, setup calibration and product qualification.
- Drive and perform the Repeatability and Reproducibility Studies which are necessary to transfer a test solution from an in-house development site or from other development sites to a full manufacturing high volume setup.
Skills, Knowledge and Expertise
- Strong programming skills (IGXL, VBT, Python).
- Significant experience with Teradyne Ultraflex and J750 systems.
- Understanding of digital and analog test principles .
- Problem-solving and analytical skills .
- Experience with GRR and test program release processes including data analysis software (eg. JMP, Examinator).
Advantage
- Mixed-signal testing expertise.
- uLED and /or display panel testing expertise.
- Knowledge of Teradyne IRIS100S system.
- Knowledge of semiconductor manufacturing and test flows.
- Knowledge of TEL probers.
- Expertise with test program control such as git.