Thesis presents the entire process of numerical analysis and topology optimization of an existing hinge assembly design, already implemented on a special vehicle. The aim of this work is to demonstrate a comprehensive process that an engineer can chronologically follow and apply to virtually any element or subassembly of a given structure. The observed process is further enhanced by applying reverse engineering principles and tools. The processes of numerical analysis and topology optimization were conducted using Autodesk Inventor Proffesional 2022 software. After confirming the correctness of the existing assembly and identifying its overdimensioning, topology optimization and geometric adaptation were undertaken. The goal of the topology optimization was to achieve maximum weight reduction of the observed assembly, ensuring that the stress values in all critical areas are equal to or slightly lower than the yield strenght. This approach aimed to achieve an “ultimately optimized“ solution for the hinge assembly under observation. This process resulted in significant weight reduction, which can provide substantial benefits in certain situations. This work does not describe advanced numerical analysis and topology optimization procedures but instead focuses on methods that are sufficiently effective to bring significant improvements to structures within a short time and using more affordable software packages.