Design a scalable Inventory Management System
Last updated: January 1, 2026
Quick Overview
Design a scalable inventory management system handling millions of requests. Discuss consistency, availability, and performance trade-offs.
Walmart
System Design
Software Engineer
Walmart
January 1, 2026Software Engineer
Onsite
System Design
Hard
123
11
3,698 solved
Design a scalable inventory management 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:
- Track real-time inventory levels across multiple locations (stores, warehouses).
- Support inventory updates (add, remove, adjust) from various sources (POS syst...
Capacity Estimation
Assuming Walmart has approximately 10,000 stores worldwide, let’s estimate the inventory management demands:
- Inventory Items: Each store manages around 10,000 unique SKUs. Therefore, total SKUs...
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