Payment and Fintech are two of the most popular categories in system design interviews. In these guides, we will explore the architecture of a payment system and a fintech system.
Learn how ACH payments work in the US, including direct deposit.
Explore the VISA payment process from authorization to settlement.
Explore the mechanics of Apple Pay and Google Pay for secure transactions.
Learn how to prevent double payments in your payment system.
Learn how foreign exchange payments work when buying/selling internationally.
Explore the key players and processes in the payments ecosystem.
A guide to understanding the payment industry and its key components.
Explore the architecture and flow of a typical payment system.
Understanding the flow of money during online transactions.
Explore the mechanics behind scan-to-pay systems and digital wallets.
Explore the architecture and workings of India's UPI payment system.
Explore payment reconciliation: challenges, solutions, and its importance.
Learn how to handle hotspot accounts in payment systems effectively.
Explore the 4 different methods of QR code payments.
Explore the SWIFT system, its role in secure, cross-border payments.
Explore Web 3.0: ownership, decentralization, and ad-free potential.
Learn about stop-loss orders and how they help minimize investment losses.
Explore the differences between digital wallets in banks and blockchain.
Explore the behind-the-scenes of e-commerce: procurement to delivery.
API and Web Development
Real World Case Studies
AI and Machine Learning
Database and Storage
Technical Interviews
Caching & Performance
Payment and Fintech
Software Architecture
DevTools & Productivity
Software Development
Cloud & Distributed Systems
How it Works?
DevOps and CI/CD
Security
Computer Fundamentals