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Why Financial System Architecture Is Different from Normal Web Systems
Lessons from designing financial platforms where correctness matters more than speed.
Anh T. Dang4 min read·Just now--
I spent the last three years helping build and operate a financial platform — BiPay, a digital wallet system. During that time, I realized something important: financial systems are fundamentally different from normal web applications.
Most engineers design financial systems like web applications and that’s a dangerous mistake.
Many software engineers learn system design by building web applications: social networks, e-commerce platforms, or content services. These systems prioritize scalability, performance, and user experience.
However, financial systems operate under very different constraints.
A bug in a social media platform might cause a page to reload or a counter to display the wrong number. A bug in a financial system can cause something far worse: money disappears.
This fundamental difference means that financial platforms such as payment systems, banking systems, and digital wallets must be designed using very different architectural principles.
