Prevent Duplicate Payments Under High Load
Company: Rippling
Role: Software Engineer
Category: System Design
Difficulty: medium
Interview Round: Onsite
Overview: This system design question tests a candidate's ability to reason about idempotency, distributed consistency, and fault tolerance in high-throughput payment systems. It evaluates practical knowledge of data modeling, concurrency control, and state machine design under real-world failure scenarios commonly assessed for backend and infrastructure roles.