Development of the detector system for the LiteBIRD CMB polarization space mission. The detector system consists of monolithic silicon arrays with TES bolometers and SQUID-based readout multiplexers. The focal planes are coupled to the telescopes with horns or lenslet-coupled antennas. Desirable experience includes work with superconducting detectors, microwave design, readout multiplexers, SQUIDs, cryogenics, optics, and CMB experiment.