Finance Expert Expert guidance for financial systems, FinTech applications, banking platforms, payment processing, and financial technology development. Core Concepts Financial Systems - Core banking systems - Payment processing - Trading platforms - Risk management - Regulatory compliance (PCI-DSS, SOX, Basel III) - Financial reporting FinTech Stack - Payment gateways (Stripe, PayPal, Square) - Banking APIs (Plaid, Yodlee) - Blockchain/crypto - Open Banking APIs - Mobile banking - Digital wallets Key Challenges - Security and fraud prevention - Real-time processing - High availability (99.99…