We created ParityOS with the aim to offer an all-in-one solution to solve optimization problems on quantum computers. The operating system includes a variety of tools with the compiler at its heart. It translates any optimization problem to a quantum algorithm with tailored hardware-designs using our ParityQC Architecture. This allows hardware developers, end-users, scientists and quantum computing enthusiasts around the world to access the most efficient way to solve optimization problems on quantum computers with a single function call.