The Payment System interview experience offers you the chance to delve into the complexities of designing a secure, efficient, and scalable digital payment gateway. This interview aims to replicate real-world challenges you'll encounter when building a payment system, composed of features like user authentication, transaction processing, and account management. Be prepared to clarify your thought process with diagrams and answer probing questions to ensure your design choices meet both user needs and stringent security requirements. This immersive experience, divided into distinct phases, will help you demonstrate your expertise in system design and problem-solving skills in a highly engaging format.

• Functional and non-functional requirements for a digital payment system.
• Designing high-level and detailed architecture, including components, data flow, and system interactions.
• Creating robust, scalable, and secure APIs and databases.
• Handling high concurrency scenarios and optimizing system performance.
• Making trade-offs to balance different system requirements like availability and consistency.

Upon completing this interview, you'll be better prepared to design comprehensive payment systems that are secure, efficient, and scalable. You'll have honed your ability to think critically and present your ideas clearly, which are essential skills for any System Design interview.