Design a Resilient Document Aggregation Service
Company: Wells Fargo
Role: Software Engineer
Category: System Design
Difficulty: medium
Interview Round: Technical Screen
Overview: This system design question tests a candidate's ability to architect a fault-tolerant, high-throughput data aggregation service involving concurrent downstream API calls, resilience patterns, and read/write separation. It evaluates practical mastery of distributed systems concepts including circuit breakers, dead letter queues, CQRS, and eventual consistency at scale.
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