When we started building Lightspark's Lightning Network infrastructure, we needed an architecture that could scale as customer demand grew. Our system needed to be flexible and capable of scaling with the growth.

After evaluating various Lightning implementations, we chose Lightning Development Kit (LDK) for two key reasons: its unique ability to manage multiple nodes in a single process and its customizability, which later allowed us to build our remote signing functionality.

...read more at lightningdevkit.org