Design a Feed Generation for Scale AI
Last updated: May 27, 2026
Quick Overview
Design a high-throughput feed generation system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Scale AI
May 27, 202633
7
2,369 solved
Design a high-throughput feed generation system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Scale AI asks this during the Onsite to assess your architectural thinking. They want to see how you decompose a complex problem, choose appropriate technologies, and reason about failure modes. Strong candidates proactively discuss monitoring, alerting, and operational concerns.
What the Interviewer Expects
- Clearly define functional and non-functional requirements
- Propose a reasonable high-level architecture with core components
- Choose appropriate data storage solutions with basic justification
- Discuss basic scaling strategies (horizontal scaling, caching)
- Identify potential bottlenecks and suggest simple solutions
Key Topics to Cover
How to Approach This
- Start by clarifying functional and non-functional requirements with the interviewer.
- Estimate the scale: QPS, storage, bandwidth. This drives your design decisions.
- Draw a high-level architecture first, then deep dive into 1-2 critical components.
- Discuss trade-offs explicitly (e.g., consistency vs availability, SQL vs NoSQL).
- Address failure scenarios, monitoring, and how the system handles 10x traffic spikes.
Possible Follow-up Questions
- How do you ensure data consistency across multiple services?
- How would you optimize costs as the system scales?
- How would you migrate from a monolithic to a microservices architecture?
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Requirements
Functional Requirements
- High-Throughput Feed Generation: The system should generate feeds in real-time, capable of handling millions of requests per second.
- Data Enrichment: Integrat...
Capacity Estimation
Assuming Scale AI has about 1 million users, each generating approximately 10 feed requests per minute:
- Total Requests: 1,000,000 users * 10 requests/user/min = 10 million requests/minute.
- **T...
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