Dev Tools · 1h ago
Building a Reliable Wallet Engine with Event-Driven Architecture
A developer details how to build a wallet engine using NestJS, PostgreSQL, Kafka, and Redis, focusing on correctness and auditability. The system uses double-entry bookkeeping and the transactional outbox pattern to prevent data loss. It handles concurrent transactions and ensures no money is created or destroyed even during failures.
Meridian48 take
This is a solid architectural deep-dive for fintech developers, but the approach is well-known; the value is in the implementation details and code examples.
Read the full reporting
Designing a Reliable Wallet Engine: Event-Driven Architecture with Kafka and TypeScript →
DEV Community
event-driven-architecturefintech-engineering