Design a large-scale Messaging Platform
Last updated: December 23, 2025
Quick Overview
Design a high-throughput messaging system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Anthropic
December 23, 2025120
7
287 solved
Design a high-throughput messaging system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Software engineering fundamentals questions at Anthropic test your understanding of core CS concepts and their practical application. This System Design Round question evaluates how you apply engineering principles to build maintainable, scalable software.
What the Interviewer Expects
- Apply engineering principles to a realistic design scenario
- Discuss trade-offs between different approaches with concrete examples
- Demonstrate understanding of testability, maintainability, and extensibility
- Connect theoretical concepts to production engineering practices
- Discuss how the approach scales with team and codebase size
Key Topics to Cover
How to Approach This
- Apply SOLID principles. Single Responsibility makes code testable, Open/Closed makes it extensible.
- Choose data structures based on access patterns, not familiarity.
- Prefer immutable data and message passing over shared mutable state for concurrency.
- Design APIs with RESTful conventions, versioning, meaningful errors, and pagination from day one.
Possible Follow-up Questions
- How would you measure the performance of this component in production?
- How would you handle backward compatibility?
- What are the security implications of this design?
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Core Design Principles
For designing a large-scale messaging platform at Anthropic, the following core design principles are paramount:
- Scalability: The system must efficiently handle millions of messages per second...
Architecture
The architecture of the messaging platform will be based on a microservices approach:
- Message Broker: A distributed message broker (e.g., Kafka or RabbitMQ) will handle the high throughput of ...
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