Digital Payment System — System Design Interview Practice
Design a payment processing system like PayPal or Stripe that handles financial transactions securely. Work through the requirements, architecture trade-offs, and an interactive design review.
Requirements and concepts to consider
- Process payments between users and merchantsRequirement
- Support multiple payment methods (cards, bank transfers, wallets)Requirement
- Handle currency conversionsRequirement
- Fraud detection and preventionRequirement
- Transaction history and reportingRequirement
- Refunds and dispute handlingRequirement
- Compliance with financial regulationsRequirement
- Handle millions of transactions per dayRequirement
- paymentsConcept to explore
- securityConcept to explore
- complianceConcept to explore
- transactionsConcept to explore
- fraud detectionConcept to explore