Here, we demonstrate an on-chip, integrated and scalable hybrid superconducting-semiconducting quantum circuit and discuss the coherent quantum transports in such system at temperature ranges between 35 mK and 800 mK [1]. Furthermore, we present the first experimental results on quantum interference effects in simply connected superconductor-2DEG junctions that lead to the observation of periodic magnetoconductance oscillations, analogous to Aharonov-Bohm interference effect in a small ring, in low orthogonal magnetic fields [2]. [1] K. Delfanazari, et al., Adv. Mater. 29, 1701836 (2017), [2] K. Delfanazari, et al., Submitted (2018