Design Image Processing Infrastructure for microservices
Last updated: June 14, 2026
Quick Overview
Design a multi-tenant image processing system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Plaid
June 14, 202610
6
2,389 solved
Design a multi-tenant image processing system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Software engineering fundamentals questions at Plaid test your understanding of core CS concepts and their practical application. This Technical Screen 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 this design change if the team size doubled?
- How would you measure the performance of this component in production?
- How would you handle backward compatibility?
- How would you document this for other engineers?
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Core Design Principles
For a multi-tenant image processing system at Plaid, the SOLID principles are critical. Specifically:
- Single Responsibility Principle: Each microservice should focus on a specific image proce...
Architecture
The architecture for the image processing infrastructure will employ a microservices approach with the following components:
- API Gateway: Acts as a single entry point for clients, routing req...
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