Footwear 3D developers design footwear models, make, adjust and modify patterns using computer aided design systems. They focus on the sustainable design of the model, the selection and design of lasts and components, the proper and efficient use of materials, the pattern making, the selection of the bottom and the elaboration of technical data sheets. They may supervise the development and evaluation of prototypes, the preparation of samples, the implementation of the necessary quality control tests on the samples, and the management of the technical documentation of the product.