Surge Pricing and Dynamic Pricing System Design Questions
Design considerations for building a scalable, low-latency surge pricing engine and dynamic pricing system within a distributed architecture. Covers data modeling for pricing rules, real-time computation, demand/supply signal integration, multi-region consistency, latency and throughput requirements, caching and cache invalidation strategies, event-driven and microservices approaches, fault tolerance, data synchronization with inventory and orders, feature flags and A/B testing, deployment strategies, monitoring, and reliability concerns.
EasyTechnical
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Explain how you would model pricing rules and metadata for a dynamic pricing engine. Provide a concise schema or data model (fields and types) for a 'pricing_rule' entity that supports: time windows, geographic scope, weighted demand signals, minimum/maximum multipliers, and versioning for safe rollouts.
EasyTechnical
0 practiced
Describe three straightforward fault-tolerance patterns a pricing API should implement to remain available during partial failures (e.g., regional outage, downstream model store failure). For each pattern, note pros/cons and recovery behaviors.
HardTechnical
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Design an idempotent pricing evaluation API that guarantees the same price is returned for duplicate requests with identical context, even under retries. Discuss idempotency tokens, TTL for tokens, storage trade-offs, and implications for stateless evaluators at scale.
HardTechnical
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You need to demonstrate a POC during a sales cycle showing <50ms price latency for 10k RPS from a customer region. Outline an end-to-end POC architecture, minimal dataset needed, synthetic load approach, and how you'd measure and present results to the customer.
EasyTechnical
0 practiced
Define key latency and throughput SLOs you would propose for a global dynamic-pricing API that must return a price to a client app within 50ms at peak load of 20,000 requests/second per region. Include P95/P99 targets, expected error budget, and how these SLOs influence architecture decisions.
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