The Infrastructure Is Not the Product
A fintech product usually has more going on than the underlying financial service. There is the provider handling things like accounts, payments, or verification. Then there is the product your customer actually sees: signing up, checking status, viewing activity, taking an action, coming back later. Behind that is another layer entirely. Someone has to handle the exceptions, check what happened, resolve a failed transaction, answer a partner's question, or work out which document is still missing. An API can connect two systems. It doesn't decide how your business should use them. That product and operational layer is where custom software can make sense.