Build a distributed Feed Generation Pipeline
Last updated: October 6, 2025
Quick Overview
Design a distributed feed generation system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Neon
System Design
Software Engineer
Neon
October 6, 2025Software Engineer
Onsite
System Design
Medium
0
10
740 solved
Design a distributed feed generation system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Neon 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
- Systematically gather requirements and estimate capacity (QPS, storage, bandwidth)
- Design a scalable architecture with clear component responsibilities
- Make well-reasoned database and caching decisions with trade-off analysis
- Address consistency vs availability trade-offs specific to the use case
- Discuss partitioning strategy, replication, and data modeling
- Cover failure handling, monitoring, and alerting strategies
Key Topics to Cover
High-level architecture and component design
Caching strategies (local, distributed, CDN)
Consistency models and replication
Database selection and data modeling
Requirements gathering and capacity estimation
Failure handling and fault tolerance
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
- What monitoring and alerting would you set up on day one?
- How would you handle a 10x increase in traffic overnight?
- How would you optimize costs as the system scales?
- How would you handle a region-wide outage?
Practice a Similar Problem on Codemia
Solve a related problem with our interactive workspace, get AI feedback, and view detailed solutions.
Solve on CodemiaSample Answer
Requirements
Functional Requirements
- Feed Generation: The system must generate personalized feeds for users based on their preferences and activities.
- Real-time Updates: The feed should be update...
Capacity Estimation
Back-of-Envelope Calculations
- User Base: Assume there are 10 million active users.
- Requests per User: Each user generates an average of 10 feed requests per hour.
- **Total QPS Calc...
Submit Your Answer
Markdown supported