About the Role You will be responsible for modelling, simulating, and optimising devices to achieve precise and high-quality colour performance. You will collaborate closely with cross-functional teams to optimise both optical and thermal performance, developing and validating models that drive innovation at Plessey. This is an exciting opportunity to apply your expertise, solve challenging problems, and continue learning in a dynamic R&D environment. Key Responsibilities Model, and optimise optical systems for MicroLED devices Perform ray tracing, optical simulations, and characterisation to validate designs Develop thermal models using COMSOL to predict device behavior under operational conditions Collaborate with materials and device engineers to understand thermal-optical-material interaction Build and maintain optical models to support ongoing R&D initiatives Apply innovative problem-solving to novel optical and thermal challenges in MicroLED technology Learn and apply LightTools for optical design; prior experience is a plus but not required Experience & Attributes Bachelor’s or higher degree in Optical Engineering, Physics, Photonics, or a related field Experience with optical design, modelling and simulations Understand the principles of colourisation Knowledge of polarisation and raytracing Experience in characterisation of optical devices Understanding of thermal effects on optical performance Ability to think holistically about materials, thermal, and optical interactions Experience building and validating optical models Good use of Comsol within research or industry Advantage Exposure to LightTools or Zemax (training can be provided) Experience in MicroLED or semiconductor device optics, you understand how these devices are made Experience with colour conversion and had exposure to quantum dots and/or perovskites Experience in coding with Python (advanced level)