Worked on the KratosMultiphysics/Kratos repository, focusing on backend and full stack development using Python. Addressed a critical bug in the PfemFluidDynamicsApplication by improving the reliability of parameter handling, specifically in workflows driven by nested parameter structures. The solution involved refactoring the iteration logic to operate over lists of parameters rather than parameter objects, which stabilized meshing and output processes. This targeted bug fix reduced user-facing failures during simulation setup and result generation, while also enhancing error messaging and maintainability. The work demonstrated careful code hygiene and contributed to the overall stability and reliability of Kratos Pfem-based workflows.