paypal

AI Engineer Interview

The interview focuses on designing a real-time risk service for evaluating transactions and handling potential issues such as data drift or model decay.

AI Engineer

8 minutes

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Questions that have appeared at PayPal for an engineering (Case Study) interview.

1. System Design

Question: Can you explain how you would design a system for managing millions of transactions per day?

Question: How would you design a system to detect fraudulent transactions?

Question: If you had to design a new payment gateway from scratch, what would be some of the key elements you would focus on?

2. Problem Solving

Question: How would you go about diagnosing a performance issue in a production system?

Question: Describe a situation where you had to troubleshoot a complex system. What was your approach and what was the outcome?

Question: Tell us about a time you had to resolve a problem that required you to dig into the code and data. What was the problem and how did you solve it?

3. Project Management

Question: Can you describe a project where you had to balance short-term needs with long-term goals? How did you handle it?

Question: Describe an instance where you had to manage a project with a tight deadline. How did you ensure that the project was completed on time?

Question: Describe a situation where you had to manage a project that had a major change in scope midway. How did you handle it?

4. Team Collaboration

Question: Can you share an instance where you had to work with a team member who was not meeting their commitments? How did you handle it?

Question: Can you describe a situation where you and your team had to make a difficult decision? How did you arrive at that decision?

Question: Describe a time when you had to collaborate with a team that was located in a different geographical location. What were the challenges and how did you overcome them?

About This Interview

Interview Type

PRODUCT SENSE

Difficulty Level

4/5

Interview Tips

• Research the company thoroughly

• Practice common questions

• Prepare your STAR method responses

• Dress appropriately for the role