Design Google Maps
Last updated: August 23, 2025
Quick Overview
Design the architecture for Google Maps. Cover scalability, data storage, caching, and real-time requirements.
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Design the architecture for Google Maps. Cover scalability, data storage, caching, and real-time requirements.
This is a common system design question asked during System Design Round at Google. The interviewer expects you to demonstrate your ability to design large-scale distributed systems, make well-reasoned trade-offs, and communicate your thought process clearly. Google values engineers who can think about scalability from day one.
What the Interviewer Expects
- Clearly define functional and non-functional requirements
- Propose a reasonable high-level architecture with core components
- Choose appropriate data storage solutions with basic justification
- Discuss basic scaling strategies (horizontal scaling, caching)
- Identify potential bottlenecks and suggest simple solutions
Key Topics to Cover
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.
Possible Follow-up Questions
- How would you handle a region-wide outage?
- What would the deployment pipeline look like for this system?
- How would you optimize costs as the system scales?
- How would you handle a 10x increase in traffic overnight?
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Requirements
Functional Requirements:
- Users should be able to search for locations by name or category.
- Users should receive real-time navigation directions based on their current location and destination....
Capacity Estimation
To estimate capacity, we can consider the following:
- Assume 1 billion monthly active users, with 30% using Google Maps daily, which gives us approximately 300 million daily users.
- If each user mak...
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