Andrew Souza
Software Engineer — Backend-oriented
Multi-tenant Modeling
How I design systems for multiple organizations without data leakage
- Clear separation between organization, unit and user
- All records are always scoped to an organization
- Tenant context resolved early in the request lifecycle
Authorization (RBAC)
Access control applied at the correct level.
- Clear roles: ADMIN, MANAGER, USER
- Rules enforced at the service layer
- Routes are not aware of business rules
Data Validation
Validation always happens at system boundaries.
- Zod validates inputs before reaching the domain
- Services assume valid data
- Errors return predictable messages