Mechanical properties of parts produced with continuous filament fabrication are influenced by the print direction, especially if the material deposed is carbon fiber or a fiber-reinforced polymer. This opens the development of new design strategies to fully exploit the unidirectionality of composites, modeling the fibers’ trajectories according to external loads and the part topology. This MSc thesis presents a complete framework that calculates optimal fibers’ paths that achieve minimal compliance for two-dimensional components. The framework is divided into two different sections. In the first one, an algorithm solving a Continuous Fibre Angle Optimization (CFAO) problem is described and solved using a gradient-based optimizer.