Standard database updates for financial balances pose risks, engineers advocate immutable ledgers

A technical article on DEV Community argues that SaaS and fintech applications using standard database updates for account balances are vulnerable to errors. The author compares this practice to problematic mutable state management in frontend development. The article promotes adopting an immutable, double-entry ledger system, modeled on historical accounting principles, as a more robust alternative. It outlines a design using TypeScript and PostgreSQL to enforce strict financial invariants and prevent data corruption.