Apollo Reference Architecture Overview Production-ready reference architecture for Apollo.io integrations. Layered design with API client, service layer, background jobs, database models, CRM sync, and deals pipeline — all built around Apollo's REST API with correct endpoints and authentication. Prerequisites - Apollo master API key - Node.js 18+ with TypeScript - PostgreSQL for data layer - Redis for job queues Instructions Step 1: Architecture Diagram Step 2: Service Layer Step 3: Deals/Opportunities Service Apollo has a full Deals API for tracking revenue pipeline. Step 4: Background Job P…