Cat qubits protect quantum information in hardware. Two coherent states of a microwave resonator are held in place by a dissipation that removes photons only in pairs, which suppresses bit flips exponentially with the cat size. This dissipation is usually activated by a microwave pump, which also turns on parasitic terms. We instead bias a Josephson junction with a dc voltage, so that Cooper pairs tunnel at a frequency selecting the useful process while every unwanted term averages to zero. We have just demonstrated this mechanism in Lyon with Alice & Bob. The internship consists in measuring the next circuit and turning this dissipation into a qubit, first a two-component cat imaged by Wigner tomography, then a four-component cat calling for a high-impedance memory.