The Internet of Things often sounds abstract until you witness it in action. A sensor flags a failing pump before it breaks. A truck reroutes itself around traffic. A hospital bed reports patient movement in real time. That seamless flow of data is powered by software that runs quietly in the background, connecting devices, networks, and analytics. Building such systems is complicated. IoT software operates at the intersection of hardware, networks, and cloud services, while users expect it to work flawlessly. When a system fails, the impact is tangible: downtime, lost inventory, safety risks.