Payment System Design

Prepare to dive into a System Design Mock Interview modeled after real interview rounds at FAANG+ companies and other leading tech firms. In this session, you’ll design the architecture of a secure, scalable, and efficient digital payment system, focusing on transaction integrity, fault tolerance, and real-time processing. The interview simulates a real System Design round, challenging you to define, design, and discuss the architecture of a high-performance payment gateway supporting authentication, transaction flow, and settlement. Expect a mix of conceptual reasoning, technical depth, and scenario-driven challenges that mirror real-world financial systems.

What You'll Practice:

• Structuring and communicating end-to-end system architectures for digital payments.
• Designing for scalability, security, and high availability under transactional load.
• Applying System Design principles to payment authorization, fraud detection, and reconciliation flows.
• Creating clear, well-structured diagrams that illustrate key components and data interactions.
• Evaluating trade-offs between latency, consistency, and fault tolerance in distributed financial systems.

By the end of this System Design Mock Interview, you’ll be ready to confidently design and articulate complex payment architectures, showcasing the depth and clarity expected in top-tier system design interviews.