A production multi-tenant SaaS for real estate developers to manage projects, inventory, and clients. It combines role-based access control, full audit logging, async processing with Celery, a documented DRF API, and server-side PDF generation for contracts and reports.
Context: PDF generation and notifications are too slow to run inside the request/response cycle.
Decision: Offload heavy work to Celery workers with Redis as the broker, keeping request latency low while supporting retries and scheduled tasks.
Context: Real estate transactions require a tamper-resistant record of who did what and when.
Decision: Write immutable audit entries for sensitive operations, decoupled from business tables so history survives record edits and deletes.