Source: MagnificOnce a fintech connects a second payment rail, a hardcoded integration turns into a maintenance problem fast. Every new PSP, bank, or card network adds its own quirks and failure modes, and at some point the only sane fix is a payment orchestration layer that routes transactions on its own terms instead of duct taped code.In this guide, we’ll review five development partners capable of building that layer for you, with a focus on who fits multi rail fintechs processing real transaction volum ...