During November 2024, Jac contributed to the Qiskit/qiskit repository by developing a core circuit optimization feature focused on the Quantum Multiplexer (UCGate). Jac implemented the mux_simp method, which programmatically removes unnecessary controls and repeated operators to streamline quantum circuits, directly improving execution efficiency and scalability. The work involved integrating mux_simp into the UCGate class, expanding test coverage to ensure the reliability of the simplification logic, and updating documentation to guide users on its benefits and usage. Jac applied expertise in Python, quantum computing, and circuit optimization, delivering a well-tested, maintainable enhancement that addressed a clear performance need.