Design a multi-tenant Email System
Last updated: December 5, 2025
Quick Overview
Design a multi-tenant email system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Goldman Sachs
December 5, 202510
6
3,067 solved
Design a multi-tenant email system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Software engineering fundamentals questions at Goldman Sachs 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
- What are the security implications of this design?
- How would this design change if the team size doubled?
- How would you document this for other engineers?
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Core Design Principles
In designing a multi-tenant email system for Goldman Sachs, the core design principles that apply are: 1. Separation of Concerns: Each tenant's data and configurations should be separated to ensur...
Architecture
The architecture for the multi-tenant email system will utilize a microservices approach, focusing on the following components: 1. API Gateway: Acts as a single entry point for all email requests,...
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