Utilizing nonlinearity as a quantum resource not only facilitates the creation of entanglement, a fundamental aspect of quantum mechanics, but also plays a crucial role in advancing quantum computing capabilities. This presentation highlights recent progress made by our team in leveraging nonlinear processes to generate entanglement and squeezing, with applications in quantum sensing. The discussion includes the use of both Three and Four Wave Mixing processes in integrated optical and microwave circuits to develop robust nonclassical sources. The first part of my talk delves into employing topological photonic systems for generating photon pairs in the telecom band, while the second segment explores the utilization of superconducting kinetic inductance thin films for signal amplification and squeezing in the microwave domain.