Design
Yelp / Local Business Search
Design a location-based business discovery platform like Yelp — search nearby businesses, read reviews, and get recommendations.
This is a Low-Level Design (LLD) problem. New to LLD vs HLD? Start here.
01 - Why interviewers ask this
Location-based discovery plus review aggregation is a strong geospatial-indexing test — interviewers check if you use a real geo-index instead of scanning all businesses and computing distance in application code.
02 - Where this system exists in the real world
You interact with this design every day.
Yelp / Google Maps / TripAdvisor local search
Restaurant and business discovery apps
Local services marketplace platforms
03 - What you'll master
Solve this once. Know it forever.
Use a geospatial index for radius search
Aggregate ratings atomically and consistently
Design collaborative-filtering-style recommendations
04 - What you'll design
8 functional · 4 non-functional requirements.
Search businesses by category, name, and location (lat/lng + radius)
7 more requirements inside
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05 - Companies that ask this
You may face this exact question in your next interview.
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