Focus on fundamentals (thermal, optics, mechanical engineering) with lots of product based engineering questions both for initial and full loop interview. Focus on plastic design (injection molding), optical design, material science and GD&T for preparation.
The interview was a technical assessment for a Product Design Engineer position. It included a wide array of technical questions, covering everything from the design phase to manufacturing processes. While the questions weren't particularly difficult, they were broad in scope, requiring a comprehensive understanding of the product development lifecycle.
Straight forward interview format with an initial HR call, followed by a technical interview with a product design engineer. Format for the technical interview was well established and straight forward.