Geospatial

Design a Proximity Service (Yelp / Nearby Places)

A location-based discovery service returning ranked nearby points of interest within a radius, backed by a spatial index for fast range queries.

Core Architectural Components

Geohash or quadtree structure enabling efficient radius queries.

Structured data for every listed place.

Answers "what's within N km of this point" quickly at scale.

Orders results by a mix of rating, distance, and relevance.

Rolls up individual reviews into the score used for ranking.

Category, price range, and hours-of-operation filtering.

Converts between addresses and coordinates for both listings and search.