Design Stripe Billing
Last updated: June 12, 2026
Quick Overview
Design the architecture for Stripe Billing. Cover scalability, data storage, caching, and real-time requirements.
Stripe
System Design
Software Engineer
Stripe
June 12, 2026Software Engineer
Onsite
System Design
Medium
0
8
1,121 solved
Design the architecture for Stripe Billing. Cover scalability, data storage, caching, and real-time requirements.
Stripe asks this during the Onsite to assess your understanding of the full ML lifecycle. They want to see how you translate a business problem into an ML objective, design the feature pipeline, and plan for model monitoring and retraining.
What the Interviewer Expects
- Define clear ML objectives with appropriate loss functions and metrics
- Design a comprehensive feature engineering pipeline
- Discuss model selection with trade-offs (complexity vs interpretability vs latency)
- Plan online and offline evaluation strategies including A/B testing
- Address serving infrastructure: batch vs real-time, latency requirements
- Consider data quality, labeling strategy, and feedback loops
Key Topics to Cover
Monitoring and model degradation detection
Training pipeline and infrastructure
ML objective formulation and metric selection
Feature engineering and feature stores
Data collection and labeling strategy
Model selection and architecture
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 is your model retraining strategy?
- How would you handle the cold start problem?
- How would you debug a model that works well offline but poorly online?
- How would you ensure fairness and reduce bias in the model?
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
- Subscription Management: Users can create, update, and cancel subscriptions.
- Invoice Generation: Automated generation of invoices based on subscription cycles. ...
Capacity Estimation
Assuming Stripe handles 1 million subscriptions at peak:
- Daily Transactions: If each subscription processes an average of 30 transactions per month, that equates to approximately **1 million...
Submit Your Answer
Markdown supported