Dealer & Vehicle Inventory Module

01The problem

One codebase serving many dealers means every query must be scoped to the right tenant — and only the right roles get the keys.

02Approach

• 01Built a modular monolith with Clean Architecture to keep tenant boundaries explicit.
• 02Propagated X-Tenant-Id header to isolate data per tenant.
• 03Implemented custom query filtering and role-based access control around the module.

03Outcomes

• Layered modules around clear domain responsibilities.
• Data isolation scoped per tenant on every read.
• RBAC gates actions that cross tenant or role lines.