Designing a Concurrent Donation Ledger With FastAPI and PostgreSQL
Every year, billions of dollars flow through online crowdfunding platforms. Yet, one fundamental question continues to cause donor friction: "Where did my money actually go?"
Traditional crowdfunding applications often function like black boxes. Payments are processed, progress bars increment, and confirmation emails are dispatched. However, under the hood, funds often linger in unverified balances without real-time auditability, milestone-driven fund releases, or atomic guarantees preventing double-allocations.
When engineering GoodCause—a social impact and giving platform—the primary objective was to eliminate this transparency deficit. The goal was to construct a full-stack system that guarantees financial integrity, atomic fund distribution, and a seamless cross-platform mobile experience.
This article breaks down the technical architecture of GoodCause, detailing how we integrated React Native (Expo Router), FastAPI domain micro-routers, and PostgreSQL Common Table Expressions (CTEs) to build an auditable impact ledger.
System Architecture Overview
The GoodCause architecture is designed around three core...
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