Build a real-time Feed Generation Pipeline
Last updated: June 8, 2026
Quick Overview
Design a real-time feed generation system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Robinhood
June 8, 20266
4
2,359 solved
Design a real-time feed generation system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Robinhood asks this during the Technical Screen 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 testing strategy would you use for this component?
- How would you measure the performance of this component in production?
- How would you handle backward compatibility?
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Core Design Principles
For the real-time feed generation system, the following core design principles apply:
- Separation of Concerns: This principle ensures that different functionalities are separated into distinct ...
Architecture
For the architecture of Robinhood's real-time feed generation pipeline, I propose a microservices architecture with the following components:
- Event Ingestion Service: This service collects use...
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