Architect a multi-tenant Feed Generation Engine
Last updated: September 18, 2025
Quick Overview
Design a multi-tenant feed generation system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Postmates
September 18, 2025230
5
3,070 solved
Design a multi-tenant feed generation system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Postmates asks this during the System Design Round to assess your depth in software engineering. They want to see understanding of design patterns, system architecture, and the trade-offs involved in different technical approaches.
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
- What are the security implications of this design?
- How would you document this for other engineers?
- How would you handle backward compatibility?
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Solve on CodemiaSample Answer
Core Design Principles
For the multi-tenant Feed Generation Engine, we will apply the following core design principles:
- Separation of Concerns: Each tenant's feed generation should be isolated to prevent one tenant'...
Architecture
The architecture for the Feed Generation Engine will be as follows:
- Microservices Architecture: We will utilize microservices to separate feed generation, data storage, and tenant management. ...
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