Overview

A scalable, double-entry banking ledger backend guaranteeing financial compliance, auditing accuracy, and crash-resilient transaction logs.

The Challenge

Transactional systems require strict guarantees against double-spending, data corruption, and race conditions under highly concurrent API traffic.

The Solution

Designed and implemented a relational schema enforcing double-entry bookkeeping constraints. Leveraged PostgreSQL serializable transaction isolation levels and row-level locking via Prisma to guarantee absolute data consistency and auditability.

Key Results

• Ensured 100% data accuracy across test transaction logs under heavy load conditions.
• Implemented full audit trails tracking every ledger change.
• Optimized query performance for ledger history fetches.