Design a high-throughput Order Processing System
Last updated: December 19, 2025
Quick Overview
Design a high-throughput order processing system handling millions of requests. Discuss consistency, availability, and performance trade-offs.
Walmart
System Design
Software Engineer
Walmart
December 19, 2025Software Engineer
System Design Round
System Design
Easy
594
10
1,999 solved
Design a high-throughput order processing system handling millions of requests. Discuss consistency, availability, and performance trade-offs.
How to Approach This
- Start by clarifying functional and non-functional requirements with the interviewer.
- Estimate the scale: QPS, storage, bandwidth. This drives your design decisions.
- Draw a high-level architecture first, then deep dive into 1-2 critical components.
- Discuss trade-offs explicitly (e.g., consistency vs availability, SQL vs NoSQL).
- Address failure scenarios, monitoring, and how the system handles 10x traffic spikes.
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Practice System Design ProblemsSample Answer
Requirements
Functional Requirements
- Order Creation: Users must be able to create new orders through the website or mobile app.
- Order Status Tracking: Customers should be able to track their orde...
Capacity Estimation
Assuming Walmart processes approximately 1 million orders daily:
- Peak Traffic: During peak hours, let's assume 20% of orders are placed, which translates to about 200 orders per second.
- **Data...
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