Developed and integrated a JAX backend for the XanaduAI/MrMustard repository, enabling backend-agnostic numerical computation with improved performance when leveraging JAX. Focused on backend development and software engineering, the work involved implementing the BackendJax class, integrating it with the backend manager, and updating datatype compatibility to support JAX workflows. Expanded the test suite to ensure robust validation of backend functionality and seamless backend-agnostic behavior. The project was completed in Python, emphasizing maintainable design and comprehensive test coverage. This integration unlocked scalable, faster computation options for users, addressing the need for high-performance numerical computation within the MrMustard codebase.