This thesis describes the process of redesigning a segment of the robotic arm BCN3D Moveo using the topology optimization design method. The process of manufacturing the segment using additive technologies is also shown. The theoretical part covers the basic principles of the structural optimization method with emphasis on topology optimization, the most complex category of structural optimization. The categorization of additive manufacturing technologies is presented and their advantages and disadvantages in comparison with conventional manufacturing technologies are described. Working principle of the fused deposition modeling technology is explained and the rules of design for the process are stated and described. In the practical part of the thesis topology optimization of a structure using the software Altair Inspire is shown in detail. Statically loaded structure is optimized with the objective to maximize stiffness with the constrain on the volume of the structure. Acquired optimal structure was designed to be easily manufactured using the fused deposition modelling technology, the manufacturing of the structure is also shown in the paper. In comparison with the initial structure, the optimal structure has higher stiffness and lower mass while retaining enough strength to satisfy the factor of safety