AppFolio Reference Architecture Overview Production architecture for property management integrations with the AppFolio Stack API. Designed for multi-property portfolios requiring real-time vacancy tracking, tenant lifecycle management, work order routing, and accounting reconciliation. Key design drivers: data freshness for leasing decisions, idempotent sync for financial accuracy, and tenant-facing portal responsiveness. Architecture Diagram Service Layer Caching Strategy Event Pipeline Data Model Scaling Considerations - Partition sync workers by property region to avoid cross-region API r…