Payment Integration Production-proven payment processing with SePay (Vietnamese banks), Polar (global SaaS), Stripe (global infrastructure), Paddle (MoR subscriptions), and Creem.io (MoR + licensing). When to Use - Payment gateway integration (checkout, processing) - Subscription management (trials, upgrades, billing) - Webhook handling (notifications, idempotency) - QR code payments (VietQR, NAPAS) - Software licensing (device activation) - Multi-provider order management - Revenue splits and commissions Platform Selection | Platform | Best For | |----------|----------| | SePay | Vietnamese…