--- title: "Payment Gateway Integration Services | Cyan Orbit" description: "We integrate payment gateways with idempotent webhook handling and tokenization, so a retried request never double-charges a customer." url: https://cyanorbit.com/solutions/payment-integration --- 1. [Home](https://cyanorbit.com/) 2. [Solutions](https://cyanorbit.com/solutions) 3. Payment Gateway Integration Solution # Payment Gateway Integration Wiring a payment processor into your product safely, with idempotent webhooks, tokenized card data, and reconciliation that catches mismatches early. [Get a project estimate](https://cyanorbit.com/get-a-quote?service=api-development) [Talk to a developer](https://cyanorbit.com/contact) NDA on request · Free, no-obligation estimate · Reply within one business day NDA before discovery You own the code and IP on payment Code in your repository from day one A working demo every two weeks Senior engineers do the work [How we work](https://cyanorbit.com/process) Charging a card is the easy part. The parts that actually cause incidents are a webhook arriving twice and charging someone twice, a payment succeeding while the order fails to save, or payout figures from the processor not matching what your own ledger shows at month end. Payment integration work goes mostly into handling those failure paths correctly; the happy path is the easy part. We integrate processors including Stripe, Braintree, Adyen, and PayPal into existing products, whether that is a one-time checkout flow, a marketplace splitting payouts between multiple parties, or a platform adding payments to a product that did not have them before. ## Usually commissioned by - Products adding online payments for the first time, whether one-time purchases or a marketplace splitting funds between parties - Companies whose current payment integration has caused a double-charge or a payment-succeeded-but-order-failed incident - Businesses needing to accept multiple currencies or payment methods beyond a single card type - Platforms that need to keep card data out of their own servers to stay within a lighter PCI DSS scope Scope ## Core features - ### Hosted or embedded checkout A hosted checkout page or an embedded form using the processor's own client-side components, so card details go directly to the processor and never touch your servers. - ### Idempotent webhook processing Every webhook handler is built to safely process the same event twice, since payment processors resend webhooks on any delivery uncertainty and a handler that is not idempotent will double-apply the result. - ### Refunds and partial refunds Full and partial refunds route through the same processor relationship and get reflected in your own order and ledger records automatically, not as a manual follow-up step. - ### Multi-currency and multi-method support Cards, digital wallets, and bank transfers across multiple currencies get supported through the processor's existing rails, rather than building separate payment logic per method. - ### 3D Secure and SCA compliance Strong Customer Authentication gets triggered for card payments where required, particularly for European transactions under PSD2, without adding unnecessary friction for payments that do not need it. - ### Fraud detection and risk rules Processor-native risk scoring gets combined with rules specific to your business, such as flagging unusual order sizes or velocity, rather than relying on the processor's generic defaults alone. - ### Reconciliation against processor payouts Automated reconciliation compares what the processor pays out against what your internal ledger expects, surfacing mismatches before they reach a monthly close instead of after. - ### Tokenization to reduce PCI DSS scope Card data is tokenized by the processor and never stored on your servers, which keeps most integrations eligible for the lightest PCI DSS self-assessment questionnaire rather than a full audit. Architecture ## Decisions that shape the build - ### Idempotency keys to prevent double charges Every charge request carries an idempotency key, so a retried request from a flaky network connection reuses the original charge result instead of creating a second one. - ### Webhook signature verification Every incoming webhook gets verified against the processor's signature before being trusted, which stops a forged request from triggering a fake payment confirmation. - ### Handling a payment that succeeds when the order does not The system needs a defined recovery path for the case where a charge succeeds but the follow-up order creation fails, since leaving that unhandled results in a customer who paid for nothing. - ### Reconciliation between the processor and your books Payout timing, processor fees, and currency conversion all affect what actually lands in your bank account relative to what was charged, and reconciliation needs to account for all three, not just the charge amount. - ### PCI DSS scope through tokenization Keeping raw card numbers off your servers by using the processor's tokenized fields is what keeps most businesses eligible for the simpler PCI DSS self-assessment rather than a full-scope audit. - ### Redundancy for high transaction volume Businesses processing a high volume of payments sometimes integrate a second processor as a fallback, which adds complexity but protects revenue if the primary processor has an outage. Build vs buy ## When to build and when to buy Stripe Checkout, Payment Links, and similar hosted flows from Braintree or Adyen are the right call when you want to accept payments with the least engineering effort and the lightest PCI DSS scope, since the processor hosts the entire payment form. We recommend starting there unless the checkout experience needs to be deeply embedded in your own UI. A custom integration using the processor's client-side components, such as Stripe Elements, is worth the extra build effort when checkout needs to match your product's design closely or needs logic a hosted page cannot express, such as splitting a payment across multiple recipients in a marketplace. A fully custom, self-hosted payment form that directly touches card data is rarely justified given how much PCI scope tokenized fields avoid. Delivery ## How delivery is phased 1. ### Define payment flows and compliance scope We map every payment scenario the product needs, one-time charges, refunds, and any split payments, and confirm the PCI DSS scope the chosen integration approach will fall under. 2. ### Integrate the gateway and webhooks Checkout, refund, and webhook handling get built and tested against the processor's sandbox environment, with idempotency and signature verification in place from the start. 3. ### Build reconciliation and failure handling Reconciliation against payouts and recovery logic for partial failures, like a successful charge with a failed order, get built and tested before moving to real transactions. 4. ### Test with real transactions and launch A limited live period with real, small transactions validates the full flow before it opens to all customers. This typically takes a few weeks from integration start to full launch. Technology ## Typical stack - [Node.js](https://cyanorbit.com/technologies/nodejs) - [PostgreSQL](https://cyanorbit.com/technologies/postgresql) - [React](https://cyanorbit.com/technologies/react) - [TypeScript](https://cyanorbit.com/technologies/typescript) - [AWS](https://cyanorbit.com/technologies/aws) FAQ ## Payment Gateway Integration FAQs How do you prevent double-charging a customer with payment webhooks? Every charge uses an idempotency key and every webhook handler is built to process the same event safely more than once, so a network retry or a duplicate webhook delivery from the processor cannot result in two charges for one purchase. What is PCI DSS scope and how does tokenization reduce it? PCI DSS scope refers to which of your systems fall under card data security requirements. Tokenizing card details through the processor's own client-side fields means raw card numbers never reach your servers, which typically keeps you eligible for the simplest self-assessment questionnaire instead of a full audit. Should we use Stripe Checkout or build a custom payment form? Stripe Checkout or a similar hosted flow is faster to launch and keeps PCI scope minimal, and is the right default. Build a custom form using Stripe Elements when the checkout experience needs to match your product's design closely or needs logic a hosted page cannot support, such as a marketplace split payment. How do you handle a payment that succeeds but the order fails to create? The integration includes a defined recovery path, such as a background job that retries order creation against a confirmed charge, or an automatic refund if the order genuinely cannot be created, so a customer is never left having paid for something that was never fulfilled. Can a payment integration support multiple currencies and payment methods? Yes. Processors like Stripe and Adyen support cards, digital wallets, and local payment methods across many currencies through the same integration, so adding a new supported currency or method is usually a configuration change rather than new development. Services ## Services involved - [API DevelopmentWe design, build, document and version REST and GraphQL APIs that partners can integrate against without calling your engineers first.](https://cyanorbit.com/services/api-development) - [Backend DevelopmentWe build the server-side systems underneath your product: data models, business logic, queues and the infrastructure that keeps them fast under load.](https://cyanorbit.com/services/backend-development) - [E-commerce DevelopmentWe build storefronts on Shopify and WooCommerce, headless commerce front ends and custom checkout flows built around your catalog, pricing and fulfillment.](https://cyanorbit.com/services/ecommerce-development) - [Custom Software DevelopmentWe build software around the processes your business already runs on, so operations stop depending on spreadsheets, workarounds and tools that were never built for your workflow.](https://cyanorbit.com/services/custom-software-development) Industries ## Industries that commission this - [Retail & E-commerceInventory, POS and storefront software that stays in sync across every channel, with EDI wired in for your wholesale partners.](https://cyanorbit.com/industries/retail-ecommerce) - [Fintech & BankingLedger-accurate financial software with KYC/AML checks and PCI DSS-aligned payment flows built in from the schema up.](https://cyanorbit.com/industries/fintech) - [Travel & HospitalityBooking engines, channel managers, and guest apps built to keep rate and inventory data straight across your PMS, OTAs, and GDS connections.](https://cyanorbit.com/industries/travel-hospitality) - [Professional ServicesEngagement management, time tracking, and client portals built around the way consulting and advisory firms actually bill for their time.](https://cyanorbit.com/industries/professional-services) Insights ## Planning guides - [6 min readHow Much Does Custom CRM Development Cost?Custom CRM development cost typically ranges from $40,000 for a focused pipeline tool to $250,000+ for a multi-team platform with automation and reporting.](https://cyanorbit.com/blog/crm-development-cost) - [7 min readCustom Development vs No-Code ToolsCustom development vs no-code tools compared on speed, cost at scale, and where each one actually holds up as your workflow gets more complex.](https://cyanorbit.com/blog/custom-development-vs-no-code) - [8 min readHow Much Does Custom Software Development Cost?Custom software development cost ranges from $15,000 for a simple internal tool to $500,000 or more for enterprise platforms. Here is what drives the number.](https://cyanorbit.com/blog/custom-software-development-cost) ## Discuss your payment gateway integration project Share a few details about your project. A senior engineer reviews every request and replies with next steps, questions, and a rough budget range. [Get a project estimate](https://cyanorbit.com/get-a-quote?service=api-development) [Talk to a developer](https://cyanorbit.com/contact)