Irfan Siddiqi is an award-winning pioneering scientist who is best-known for the development of the Josephson bifurcation amplifier. He was born in Karachi and moved to the USA where he studied at Columbia, Harvard and Yale universities. He is Director of the Advanced Quantum Testbed and Professor of Physics at the Quantum Nanoscience Laboratory (established by him) and the Department of Physics at the University of California, Berkeley. In 2021, he received the Joseph F Keithley Award.