Design
Social Event Planning App (Meetup-like)
Design an app for creating and discovering local social events, with RSVPs, groups, and recommendations.
This is a Low-Level Design (LLD) problem. New to LLD vs HLD? Start here.
01 - Why interviewers ask this
It combines geospatial discovery with the same reserve-or-waitlist capacity pattern seen elsewhere — interviewers check if you reuse a known-good pattern instead of reinventing it.
02 - Where this system exists in the real world
You interact with this design every day.
Meetup / Eventbrite event platforms
Community and interest-group organizing apps
Corporate/team social event planning tools
03 - What you'll master
Solve this once. Know it forever.
Design geospatial "events near me" queries
Reuse capacity/waitlist patterns for RSVPs
Model groups, interests, and recommendations
04 - What you'll design
6 functional · 2 non-functional requirements.
Create a group around a shared interest
5 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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