Amazon, Walmart, Shopify, DoorDash, etc.
What they test:
- Real-time data processing
- Recommendation and personalization pipelines
- Inventory and supply chain data
- High-volume event processing
Interview loop:
- System design for real-time use cases
- SQL with sessionization and funnel analysis
- Streaming concepts (Kafka, exactly-once)
- Behavioral focused on customer impact
Preparation focus:
Event-driven architectures. Sessionization queries. A/B testing data pipelines. Think about customer-facing data latency requirements.