Stripe, PayPal, Razorpay, Square, Authorize.Net, etc.
Custom checkout flows (one-time, subscriptions, recurring billing)
Tokenization & PCI DSS compliance
End-to-end payment platforms (like building your own Stripe)
Digital wallets & virtual cards
QR-code based payments
Peer-to-peer (P2P) transfers
Android/iOS wallet apps with secure payments
NFC and contactless solutions
In-app purchase systems (Apple Pay, Google Pay)
Cloud-based POS software for retail or restaurants
Hardware-software sync (barcode scanners, card readers, printers)
Integration with ERPs or accounting platforms
Auto-renewal billing engines
Plan management, invoicing, dunning management
Usage-based pricing calculators
Integration with SWIFT, Wise, Western Union APIs
Real-time currency conversion
Automated tax and compliance for multiple jurisdictions
AI/ML-based fraud detection models
Real-time transaction monitoring
KYC/AML compliance integrations
Integration of crypto wallets (BTC, ETH, USDT)
Smart contract development for tokenized payments
NFT and Web3 payment flows
APIs to integrate with Affirm, Klarna, Afterpay, etc.
Custom installment logic and credit scoring
Cashback management
Integration with loyalty platforms
Real-time balance management APIs