System designHardsd-g143

Subject Ride hailingLevel Senior–Staff~45 minCommon in Distributed systems interviewsIndustries Technology

Question

Design the surge/dynamic-pricing system for a ride-hailing platform. It must compute a per-area price multiplier from the live supply (available drivers) and demand (open requests + app-open intent) in that area, update every ~30s, stay stable enough to not whiplash riders, and be explainable/auditable for regulators. Cover the geo-aggregation, the pricing computation, and consistency across the rider/driver views.

What a strong answer looks like

Clarify scale and constraints first. Propose a clean component breakdown, then go deep on the hard parts — data model, bottlenecks, consistency, failure modes — and name the trade-offs you are making.

Learn the concepts

Narrate your design

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Run or narrate your approach, then ask the coach.