Design Walmart Product Search
Last updated: June 17, 2026
Quick Overview
Design the architecture for Walmart Product Search. Cover scalability, storage, caching, and real-time requirements.
Walmart
System Design
Machine Learning Engineer
Walmart
June 17, 2026Machine Learning Engineer
Technical Screen
System Design
Hard
732
14
4,064 solved
Design the architecture for Walmart Product Search. Cover scalability, storage, caching, and real-time requirements.
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
- Search Functionality: Users should be able to search products by keywords, categories, and filters (price, brand, ratings).
- Autocomplete Suggestions: As users typ...
Capacity Estimation
Back-of-Envelope Calculations
- User Base: Assume Walmart has 100 million active users.
- Search Queries: If each user performs an average of 5 searches per day, that results in 500 million ...
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