How do I approach System Design interview questions?

System Design questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master system design interviews.

What difficulty level is this interview question?

This is a hard difficulty System Design question, commonly asked during Onsite rounds at OpenAI.

What role is this question designed for?

This question is commonly asked for Software Engineer candidates at OpenAI during technical interviews.

Design a payment processing system

Last updated: Mar 29, 2026

Quick Overview

This question evaluates system-design competency in building reliable payment workflows, covering distributed transaction handling, idempotent APIs, asynchronous external integrations, and accounting/ledger correctness.

|Home/System Design/OpenAI

Design a payment processing system

OpenAI

Dec 15, 2025, 12:00 AM

hardSoftware EngineerOnsiteSystem Design

Submit Your Answer to Earn 20XP

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Design a payment processing system

Last updated: Mar 29, 2026

Quick Overview

|Home/System Design/OpenAI

Design a payment processing system

OpenAI

Dec 15, 2025, 12:00 AM

hardSoftware EngineerOnsiteSystem Design

Submit Your Answer to Earn 20XP

Loading comments...

Browse More Questions

More System Design•More OpenAI•More Software Engineer•OpenAI Software Engineer•OpenAI System Design•Software Engineer System Design

Your design canvas — auto-saved