Payment Gateway Integration Services
Multi-Gateway Infrastructure That Maximises Conversion and Minimises Decline Rates
Halkwinds designs and implements enterprise payment gateway integrations that reduce checkout decline rates, support global payment methods, optimise routing across acquiring banks, and maintain PCI compliance across every payment touchpoint.
Enterprise Challenges
Challenges We Solve
Single Gateway Dependency and Outage Risk
Organisations relying on a single payment gateway face complete revenue interruption during processor outages — particularly damaging during promotional events and billing periods.
High Checkout Decline Rates Losing Revenue
Decline rates of 8–15% are common in enterprise e-commerce. A significant portion are soft declines reroutable to alternative acquirers — revenue recoverable without customer intervention.
International Payment Method Coverage Gaps
Global businesses accepting only card payments are invisible to customers whose primary method is SEPA, iDEAL, PIX, Alipay, or regional bank transfer — directly limiting addressable market.
PCI Scope Creep in Custom Implementations
Custom payment implementations that bring cardholder data into application scope significantly expand PCI DSS audit scope. Tokenisation and hosted field architecture eliminate this exposure.
Subscription Billing and Retry Logic Complexity
Subscription businesses experience involuntary churn from declined recurring payments that smart retry logic, account updater services, and dunning workflows can significantly reduce.
3DS2 and Strong Customer Authentication Friction
Poorly implemented SCA adds authentication steps to low-risk transactions that exemptions could eliminate — reducing checkout conversion without commensurate fraud benefit.
What We Deliver
Core Capabilities
Multi-Gateway Payment Orchestration
Payment routing across multiple acquiring banks based on card type, issuer, geography, and failure pattern intelligence — maximising authorisation rates with automatic failover.
PCI DSS Compliant Integration Architecture
Tokenisation, hosted fields, and iframe-based card capture eliminating cardholder data from application scope — with PCI SAQ A or A-EP documentation.
Local and Alternative Payment Methods
Integration of SEPA, iDEAL, Bancontact, Alipay, WeChat Pay, PIX, UPI, and BNPL providers — supporting the payment preferences of your target customer geography.
Subscription and Recurring Billing Infrastructure
Subscription plan management, payment schedule automation, smart retry logic, account updater integration, dunning email workflows, and revenue recovery analytics.
3DS2 and Fraud Tool Integration
3DS2 with exemption optimisation for low-risk transactions, Stripe Radar, Adyen RevenueProtect, and custom ML fraud model integration.
Payment Analytics and Reconciliation
Real-time authorisation analytics, decline reason classification, gateway performance monitoring, settlement reconciliation automation, and chargeback management.
Buy Now Pay Later Integration
Integration with Klarna, Afterpay, Affirm, and regional BNPL providers — with eligibility routing, order management integration, and settlement reconciliation.
B2B Payment and Invoice Integration
ACH, wire transfer, virtual card, and B2B payment method integration for platforms serving business customers — with invoice management and ERP synchronisation.
Enterprise Use Cases
In Production
Payment Orchestration for Global E-commerce
Challenge
Enterprise retailer with $420M annual payment volume on a single gateway experiencing 8.4% decline rate and complete revenue interruption during gateway outages.
Solution
Multi-gateway orchestration across four acquiring banks with ML-powered routing, automatic failover, and local payment method support for 8 markets.
Outcome
Decline rate reduced from 8.4% to 3.1%. Subsequent gateway outages caused zero revenue interruption. Local payment adoption reached 18% of volume.
Subscription Churn Reduction for SaaS
Challenge
SaaS company with 42,000 subscribers experiencing 4.2% monthly involuntary churn from failed card payments — representing $2.1M annual recurring revenue loss.
Solution
Smart retry orchestration with ML-optimised timing, account updater integration, dunning email sequence, and pause-before-cancel grace period.
Outcome
Involuntary churn reduced from 4.2% to 1.1%. $1.8M annual recurring revenue recovered.
3DS2 Optimisation for European Marketplace
Challenge
European marketplace with 68% checkout conversion post-PSD2 mandate, with blanket 3DS authentication applied to all transactions regardless of risk profile.
Solution
3DS2 with transaction risk analysis and exemption optimisation for low-risk, low-value, and recurring transactions.
Outcome
Checkout conversion improved from 68% to 81%. Authentication challenge rate reduced from 100% to 23% of transactions.
B2B SaaS Payment Expansion
Challenge
B2B SaaS platform with 800 enterprise customers, with 34% requesting invoice billing due to Stripe-only integration unable to support enterprise payment requirements.
Solution
Multi-method integration covering ACH debit, ACH credit, virtual card acceptance, net terms, and ERP synchronisation.
Outcome
Manual invoice billing requests reduced from 34% to 8%. Collections cycle reduced from 42 to 18 days.
Global Travel Platform Checkout Optimisation
Challenge
Travel platform in 34 markets with card-only checkout, 12.8% decline rate, and zero local payment method support limiting conversion where card penetration was below 40%.
Solution
Localised checkout with 24 local payment methods, acquirer routing by geography, 3DS2 with country-specific exemption strategies, and dynamic currency conversion.
Outcome
Overall decline rate reduced to 4.6%. Checkout conversion in targeted markets improved an average of 18 percentage points.
PCI Scope Reduction for Healthcare Payments
Challenge
Healthcare network with legacy payment integration placing cardholder data in scope for 3 internal systems — requiring expensive SAQ D compliance.
Solution
Payment page redesign using hosted payment fields and tokenisation — eliminating cardholder data from application scope and reducing PCI scope to SAQ A.
Outcome
PCI audit scope reduced from SAQ D (200+ requirements) to SAQ A (22 requirements). Annual PCI compliance cost reduced 74%.
Industry Applications
Across Sectors
E-commerce and Retail
Multi-gateway orchestration, local payment methods, BNPL integration, and subscription billing infrastructure reducing decline rates across global consumer commerce.
SaaS and Subscription Businesses
Subscription lifecycle management, smart retry orchestration, account updater, and dunning workflows reducing involuntary churn from payment failures.
Marketplace Platforms
Multi-seller payment routing, escrow and split payment mechanics, seller onboarding and KYC integration, and marketplace fee management.
Healthcare and Medical Billing
Patient payment processing, HSA/FSA card acceptance, payment plan integration, and healthcare-specific PCI scope minimisation.
Travel and Hospitality
Multi-currency checkout, local payment methods, pre-authorisation and capture management, refund automation, and chargeback dispute management.
B2B Platforms and Marketplaces
ACH and bank transfer integration, net terms and invoice management, virtual card acceptance, and ERP synchronisation for enterprise B2B procurement.
How We Deliver
Delivery Process
Payment Stack Assessment
Analysis of your current payment architecture, decline rate breakdown, gateway performance metrics, PCI scope, and international coverage gaps — with quantified revenue impact.
Gateway and Payment Method Strategy
Selection of optimal gateway combination for your transaction mix, geography, and volume — with payment method roadmap and 3DS2 exemption strategy.
PCI-Safe Integration Architecture
Integration architecture using hosted fields, tokenisation, and scope-minimising patterns — documenting PCI scope boundaries and SAQ classification before development.
Integration Development and Testing
Gateway API integration, payment UI components, webhook handling, retry logic, reconciliation pipeline, and comprehensive test coverage against gateway sandbox environments.
Performance and Failover Testing
Load testing at projected peak transaction volumes, gateway failover validation, retry logic simulation, and 3DS2 flow testing across browser and device combinations.
Launch and Conversion Optimisation
Phased production rollout, real-time authorisation monitoring, decline reason analysis, and ongoing conversion optimisation with monthly analytics reviews.
FAQ
Common Questions
We integrate with Stripe, Adyen, Braintree, PayPal, Checkout.com, Worldpay, Cybersource, Square, and regional gateways across 40+ markets. Gateway selection is driven by your transaction mix and geography.
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Custom Software Development
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Work With Halkwinds
Recover Revenue Your Payment Integration Is Leaving on the Table
Halkwinds identifies and resolves the decline rate, routing, and local payment method gaps costing your business measurable revenue.
Architecture. Engineering. Scale. — Built by Halkwinds Product Engineering.