Stablecoin Payments Push Developers to Build Complex Financial Infrastructure

Stablecoins are increasingly being used for cross-border payments, shifting significant technical complexity onto developers who must handle routing, accounting, verification, and user experience. Yellow Card recently raised $40 million to expand stablecoin payment infrastructure across Africa, where fragmented and costly traditional payment systems make the model especially relevant. A stablecoin payment involves multiple layers — choosing the right asset and blockchain, confirming transactions, converting to local currency, and connecting with off-ramp liquidity providers. Developers must also account for the fact that the same stablecoin, such as USDT or USDC, can exist on different networks with varying liquidity, making asset name alone insufficient information for processing payments. Rather than replacing traditional payment infrastructure, stablecoins redistribute where different parts of that infrastructure sit, with blockchains handling settlement while applications manage the rest.