It's probably not difficult - there's plenty of libraries for every framework and stack. My guess is this product was developed in an "agile" fashion. The contr

It's probably not difficult - there's plenty of libraries for every framework and stack. My guess is this product was developed in an "agile" fashion. The contracting company showed a "POC" that did what the product owner / VIP wanted to. Then they probably said "ship it". Product managers are more concerned with functionality than other things like scalability or security. My guess is they just never explicitly asked for it.