Payment Solutions
Reliable, compliant payment infrastructure integrated into your platform. From one-off transactions to complex subscription billing, built to handle edge cases, reduce failures, and scale with your revenue.
Providers we work with
What payment integration actually involves
It is harder than it looks
Payment integration looks straightforward on the surface: add a checkout form, connect to Stripe or PayPal, done. In practice, it involves tokenisation, webhook handling, idempotency, retry logic on failures, handling card declines gracefully, managing refund states, and dealing with the full lifecycle of a subscription or marketplace payout. When these are built correctly, they are invisible. When they are built carelessly, they become the source of revenue loss, support tickets, and compliance exposure.
How we handle Stripe integrations
Stripe is the provider we work with most frequently, and we know its API in depth. A production Stripe integration from us covers the full charge lifecycle: customer creation, payment method storage, charge and authorisation flows, webhook signature verification, dispute handling, and reconciliation exports. We also handle the edge cases most integrations get wrong: idempotent charge retries that prevent double-billing, correct handling of incomplete payment states, and 3D Secure flows that do not break mobile conversion.
Subscription billing specifics
Subscription billing adds significant complexity beyond one-off payments. Trial periods, upgrade and downgrade proration, pause and resume flows, failed payment dunning sequences, and cancellation with access grace periods all need to be thought through carefully. We design subscription billing logic that handles these scenarios reliably, keeps the payment provider and your database in sync, and provides your finance team with clean reconciliation data.
What clients receive on completion
Every payment integration we deliver includes full documentation of the architecture and data flows, a test suite covering core payment paths and failure scenarios, a sandbox environment for ongoing testing, and a handover session with your development team. You will understand exactly how the integration works and be able to extend it independently.
Payment integration mistakes we commonly fix
When we review existing payment integrations, these are the problems that come up most often.
Webhooks that fail silently
Webhook endpoints that return errors or time out without any alerting. Payment events get lost, order statuses go out of sync with the payment provider, and nobody knows until a customer complains.
No retry logic on failed payments
Subscription platforms with no dunning sequence. When a card expires or a payment fails, the customer is churned passively rather than retried after a few days with a notification, which recovers a significant portion of otherwise lost revenue.
Missing PCI scope separation
Implementations where card data or full PANs pass through the application server rather than being tokenised entirely on the payment provider side. This brings the entire server into PCI scope unnecessarily.
Untested refund and cancellation flows
Refund and cancellation logic that was never properly tested against the payment provider API. Bugs in these flows only surface in production, typically when a customer is already frustrated.
Currency handling bugs
Decimal precision errors and incorrect currency conversion logic that only manifest in cross-border transactions. Particularly common when amounts are stored as floats rather than integer minor units.
Subscription state out of sync
Application subscription state that diverges from the payment provider because webhook events were missed or processed out of order. Users end up with active access after cancellation, or locked out after a successful payment.
Payment integration capabilities
Payment infrastructure that is reliable, secure, and built for your specific business model.
Payment Gateway Integration
Integration of leading payment providers into your platform, handled cleanly, tested thoroughly, and documented for your team to maintain.
Subscription & Recurring Billing
Plan management, trial periods, proration, upgrade and downgrade flows, dunning processes, and cancellation handling, built for reliability and compliance.
Multi-Currency & International
Currency detection, localised pricing, and cross-border payment flows that let you sell globally without a fragmented checkout experience.
PCI Compliance & Security
Payment flows architected to meet PCI-DSS requirements. Tokenisation, secure form handling, and data separation built in from the start.
Payment Analytics & Reconciliation
Revenue dashboards, failed payment tracking, refund visibility, and automated reconciliation reports that keep your finance team informed.
Payment Flow Optimisation
Reduction of payment failures through smart retry logic, card updater integrations, and declined transaction analysis that recovers revenue passively.
Business models we support
Payment requirements vary widely by business model. We design and implement the right architecture for your specific transactional flows.
SaaS & Subscription Businesses
Full billing lifecycle management: from trial to paid, upgrade/downgrade, pause, and cancellation, with minimal churn friction.
E-Commerce Platforms
Multi-gateway checkout with smart routing, wallet payment support, and buy-now-pay-later integration.
Marketplaces & Platforms
Split payments, seller payouts, escrow handling, and platform fee collection built into the transaction flow.
Enterprise Applications
Invoice-based billing, purchase order workflows, and ERP-connected payment reconciliation for B2B scenarios.
Get your payment infrastructure right
Payment complexity is often underestimated. Let's talk about your requirements early, before it becomes a problem.
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