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Companies / Circle

Circle interview questions

Explore questions associated with Circle. Review the source details, then use the workspace for code, notes, and diagrams.

9 questions in the library. A source association does not guarantee a future interview question.

Behavioral and leadership · Coding · Object-oriented design · System design

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Circle interview questions | SysRound

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9 questions

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Object-oriented designDifficulty not specified
Design a Flight Ticket Booking System
Design a flight ticket booking system where users can search for flights based on source, destination, and date, and book tickets accordingly. Payment processing is…
Companies: Circle, Amazon
Last reported Aug 2026
Open workspace
System designDifficulty not specified
Design a Blockchain Monitoring System
Design a blockchain transaction monitoring system. Each blockchain has many blocks, and each block has transactions with incrementally assigned IDs. Three APIs are provided…
Companies: Circle
Last reported Aug 2026
Open workspace
CodingDifficulty not specified
Design an Airline Booking System
Implement an API to book the cheapest available flight. A code framework and PostgreSQL database are provided; you may use any programming language. The system…

Companies: Circle

Last reported May 2026

Object-oriented designDifficulty not specified

Design a movie ticket booking system

Design a movie ticket booking system similar to BookMyShow that allows users to browse movies, select theaters and showtimes, book tickets, and manage reservations.

Companies: Circle, Microsoft, Nextiva, Payoneer

Last reported Mar 2026

System designHard

Design a ticket booking system like Ticketmaster

Contention on scarce inventory: seat holds with TTL, locking/optimistic concurrency, payments, flash-sale traffic and virtual queues.

Companies: Circle, Agoda, Airwallex, Amazon +15

concurrency · idempotency · load-shedding · locking

Last reported Mar 2026

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Object-oriented designDifficulty not specified

Design a Vehicle Renting System

Design a Vehicle Renting System that allows users to search, book, and return rental vehicles. The system should support multiple types of vehicles, pricing strategies…

Companies: Circle, Amazon

Last reported Mar 2026

System designHard

Design an airline reservation system

Reservations across several flights require temporary holds, strict seat ownership, fresh search results, and safe payment recovery.

Companies: Circle, Axon, Bol.Com, Expedia +2

concurrency · flight-search · idempotency · inventory

Last reported Mar 2026

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Behavioral and leadershipDifficulty not specified

Tell me about a time you had a conflict with a coworker. How did you resolve it?

Companies: Circle, Adyen, Airbnb, Amazon +31

Last reported Apr 2025

Behavioral and leadershipDifficulty not specified

What project are you most proud of?

Companies: Circle, Adyen, Amazon, Anthropic +37

Last reported Apr 2025