A Gridgen developer is responsible for creating and managing computational grids used in numerical simulations. They design and refine complex geometric models, generate structured and unstructured grids, and optimize them for specific computational fluid dynamics (CFD) applications. Their work involves proficiency in Gridgen software, understanding of mathematical algorithms, and knowledge of physics and engineering principles. They work closely with engineers and scientists to understand the requirements of each simulation, ensuring the grid accurately represents the physical model. They also troubleshoot issues, improve grid quality, and contribute to the development of new grid generation techniques and tools.