Payment Integration for Fintech Companies

Our payment integration for fintech covers multi-rail processing architecture, real-time ledger systems, cross-border infrastructure, card programs, and embedded payment APIs — each designed for the reliability, scalability, and regulatory compliance that financial products demand.

Multi-rail payment processing architecture designs and implements intelligent payment routing across available rails. We develop payment router services that evaluate each transaction against rail characteristics — selecting ACH for cost-optimized standard transfers, RTP or FedNow for instant settlement requirements, wire transfer for high-value immediate needs, and card networks for consumer-initiated flows. Rail selection logic incorporates transaction amount, speed requirement, recipient capability, cost optimization, and failure fallback routing. Payment processor integration connects with processors including Stripe, Plaid, Dwolla, Modern Treasury, and Column for ACH origination, wire initiation, and instant payment submission. Transaction lifecycle management tracks each payment through initiation, processing, settlement, and reconciliation states with real-time status visibility and webhook-based event notification. Error handling and retry logic manages payment failures including insufficient funds, invalid accounts, and network errors with configurable retry strategies and escalation procedures.

Real-time ledger system development builds the core financial record-keeping infrastructure for fintech products. We design double-entry ledger architectures that maintain account balances through immutable transaction records with real-time balance calculation capability. Ledger data models are designed for the specific financial product — checking account ledgers with pending transaction and hold management, lending ledgers with interest accrual and payment waterfall logic, marketplace ledgers with multi-party settlement and fee calculation, and wallet ledgers with multi-currency support and exchange rate management. High-throughput transaction processing handles peak volumes with consistent latency through database optimization, caching strategies, and horizontal scaling architecture. Reconciliation systems compare ledger positions against bank account balances and payment processor records daily, identifying and alerting on discrepancies that require investigation.

Cross-border payment infrastructure builds international money movement capability. We integrate with international payment networks and correspondent banking channels through providers including Wise, Currencycloud, and SWIFT gpi for multi-currency transfer execution. Foreign exchange management implements rate quoting, margin configuration, and hedge execution for currency conversion with transparent pricing disclosure. Sanctions screening integration checks transactions against OFAC, EU, and other sanctions lists with configurable handling for positive matches. Multi-jurisdictional compliance implements KYC and AML requirements for sending and receiving jurisdictions with documentation management for cross-border regulatory requirements.

Card program development implements virtual and physical card issuance through API-based card platforms. We integrate with card issuance platforms including Marqeta, Lithic, and Stripe Issuing to provide instant virtual card generation, physical card ordering and fulfillment, and programmable spending controls. Transaction authorization logic implements real-time spending rules — merchant category restrictions, single-transaction limits, daily spending limits, geographic restrictions, and custom business logic that evaluates each transaction against configurable criteria. Card management APIs enable end users to freeze and unfreeze cards, set spending limits, and view transaction history through the fintech product interface.

Embedded payment API development builds payment infrastructure that fintech companies can offer to their platform customers. We design multi-tenant payment architectures where each platform customer receives isolated payment capability — their own merchant accounts, fund holding, payout schedules, and reporting — managed through the fintech platform APIs. Onboarding flows implement KYC verification for platform customers with progressive disclosure that collects required information without friction. Settlement management calculates platform fees, payment processing costs, and net payouts with configurable settlement schedules and payout methods.

Payment integration for fintech is priced based on infrastructure scope, transaction volume design capacity, and regulatory compliance requirements. Real-time ledger systems range from $120,000 to $350,000 depending on product complexity and throughput requirements. Multi-rail payment routing infrastructure ranges from $80,000 to $250,000. Card program integration and management ranges from $60,000 to $180,000. Cross-border payment infrastructure ranges from $100,000 to $300,000. Comprehensive payment stacks combining ledger, routing, cards, and compliance range from $300,000 to $800,000.

Ongoing infrastructure costs including hosting, payment processor fees, and operational support range from $8,000 to $25,000 per month before transaction volume-based processing fees. Payment processing fees vary by rail and volume.

Every engagement begins with a payment architecture assessment ranging from $5,000 to $15,000 that evaluates product payment requirements, identifies optimal rail selection and processor partnerships, designs ledger architecture for the specific product model, and produces a detailed infrastructure plan with scalability projections and total cost of ownership estimates.