Design
Event Ticketing Platform
Design a ticketing platform (like Ticketmaster) for concerts and sports events with seat selection and high-demand sale handling.
This is a Low-Level Design (LLD) problem. New to LLD vs HLD? Start here.
01 - Why interviewers ask this
It stress-tests seat-holds and high-demand fairness at once — interviewers use it to see if you'd survive a real on-sale traffic spike, not just handle the calm-day case.
02 - Where this system exists in the real world
You interact with this design every day.
Ticketmaster / StubHub event ticketing
Concert and sports event box-office systems
Conference and meetup ticketing platforms
03 - What you'll master
Solve this once. Know it forever.
Implement time-boxed seat holds during checkout
Design a fair queue for high-demand on-sales
Prevent double-selling under massive concurrency
04 - What you'll design
6 functional · 2 non-functional requirements.
Browse events and view available seating sections
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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