Emmanuel Flurin is a researcher at CEA Saclay (Quantronics group, Université Paris-Saclay), working at the intersection of superconducting quantum circuits and electron spin resonance. He received his PhD from ENS Paris in 2014 under Benjamin Huard and Michel Devoret, where he developed the Josephson mixer as a tool for microwave quantum optics, then conducted postdoctoral research in Irfan Siddiqi's group at UC Berkeley (2014–2017), exploring quantum simulation, quantum measurement, and machine-learning reconstruction of quantum trajectories. He now leads the ERC-funded INGENIOUS project, developing a platform for single-spin magnetic resonance at microwave frequencies using a single microwave photon detector. Key milestones include the first microwave spin fluorescence detection (Nature, 2021), the first single electron-spin ESR by photon counting (Nature, 2023), and individual solid-state nuclear-spin qubits with coherence exceeding one second (Nature Physics, 2025). He is a recipient of the Herbrand Prize of the French Academy of Sciences (2023).