FinTech apps risk financial errors with mutable database design, experts say

Financial technology applications built using standard mutable database states are prone to serious accounting errors, according to a technical article. The article explains that storing a user's balance as a single, updatable value can lead to race conditions during simultaneous transactions. This can result in incorrect balances, such as a user being able to withdraw more money than they have. The piece advocates for adopting double-entry bookkeeping principles, which treat financial transactions as immutable historical events, to ensure accuracy and auditability.