American Express Interview Questions and Guide
Card payments and authorization at scale, fraud detection, secure APIs and enterprise reliability.
The American Express interview loop
- Online assessment
- Technical interview
- Final round: coding, system design and behavioral (Blue Box values)
American Express interview questions
- Design a Payment System
- Design Cash App (P2P Payments)
- Zigzag Conversion
- Subarray Sum Equals K
- In-Memory Database (Multi-Part)
- Nearest Exit from Entrance in Maze
- Time-Based Key-Value Store
- Number of Operations to Make Network Connected
- Coin Change
- Coin Change II (Unbounded Knapsack)
- Modular Exponentiation
- Design a Digital Wallet
- Tell me about a time you took ownership beyond your role
- What questions do you have for me?