Secure Finance: Enterprise Data Engine
// Built with Clean Architecture & Zero-Trust RBAC
The Challenge
Financial management systems require extreme data integrity, audit trails, and granular access control. The challenge was to build a production-grade backend that ensures analysts can see data, admins can modify it, and viewers are strictly restricted—all while maintaining 100% test coverage for critical paths.
Architecture Principle
By following Clean Architecture (Uncle Bob), we decoupled business logic (Services) from data persistence (Repositories). This allows for swapping database engines (SQLite to PostgreSQL) with zero changes to the core logic, ensuring future-proof scalability.
The Solution: Zero-Trust Backend Architecture
- Data-Driven RBAC: Implemented a permission matrix that decouples role definitions from enforcement logic. Adding new permissions requires no code changes to the security dependencies.
- SOLID Mastery: Applied all 5 SOLID principles, particularly Dependency Inversion (Services depend on Repository abstractions) and Single Responsibility.
- Audit Compliance: Every financial record uses a soft-delete mechanism, ensuring that "deleted" data remains available for audit history without being visible in standard queries.
Production Readiness
41+
Automated Tests (Pytest)
100%
SOLID Compliance
Zero
External DB Hard-coding