finance-expert

Expert guidance for financial systems, FinTech applications, banking platforms, and payment processing. Expert guidance for financial systems, FinTech applications, banking platforms, payment processing, and financial technology development. ❌ Using float for money calculations ❌ Storing credit card data unencrypted ❌ No transaction logging/audit trail ❌ Synchronous payment processing ❌ No idempotency in payment APIs ❌ Ignoring PCI-DSS compliance ❌ No fraud detection - Covers payment gateway integration (Stripe), open banking APIs (Plaid), and core banking concepts including PCI-DSS, SOX, and Basel III compliance - Includes practical code examples for payment processing, refunds, webhook handling, and bank account/transaction retrieval - Provides financial calculation utilities for compound interest, loan amortization, NPV, and ROI with proper Decimal precision - Addresses fraud detection using machine learning features, KYC/AML verification, and regulatory compliance patterns - Emphasizes security best practices: tokenization, encryption, audit trails, idempotency, and avoiding common anti-patterns like float-based money calculations - Core banking systems - Payment processing - Trading platforms - Risk management - Regulatory compliance (PCI-DSS, SOX, Basel III) - Financial reporting - Payment gateways (Stripe, PayPal, Square) - Banking APIs (Plaid, Yodlee) -...