The problem
Wallet and credit systems need to handle retries, concurrent requests, and balance-changing operations without creating duplicate or inconsistent records.
Design direction
Kizo explores backend infrastructure for digital wallets, ledgers, rewards, credits, and virtual assets. The focus is not only on endpoints—it is on preserving transactional integrity when real systems retry or process work asynchronously.
What I am exploring
- Idempotency for balance-changing operations
- Ledger-oriented records for traceability
- Redis for coordination and distributed locking where appropriate
- PostgreSQL transaction boundaries
- A future Spring Boot implementation alongside the current Node.js version
Current status
Kizo is an active platform project. Implementation notes and architectural trade-offs will be added here as the product evolves.