Stripe · PayPal · Mollie · Subscriptions
I set up and integrate supported payment gateways including Stripe, PayPal, and Mollie, connecting checkout, subscriptions, wallets, transaction records, webhooks, and user-facing payment states to existing PHP products.
Senior PHP & Backend Developer
Focused Payment Integrations capabilities
Each capability is scoped against the installed version, hosting, current behavior, and surrounding customizations before implementation begins.
Connect an agreed provider account and payment method to an existing PHP application using the current provider integration path.
Tie a payment attempt to the correct cart, order, user, amount, currency, and interface result.
Connect provider subscription states to plans, access, renewal, cancellation, and existing application records.
Verify supported callbacks and apply asynchronous provider events to internal payment or subscription state.
Connect payment results to internal wallet, ledger, credit, transaction, or administrative views when the product requires them.
Trace checkout or subscription problems across PHP, JavaScript, provider responses, credentials, webhooks, database state, and environment mode.
Clear service boundaries
These boundaries preserve the difference between evidenced Payment Integrations work and a broader service that has not been claimed.
The client controls gateway accounts, identity checks, supported countries, payout settings, reserves, pricing, limits, and provider approval decisions.
This page describes integration capability and representative workflows. It does not claim a payment volume, conversion rate, revenue result, approval rate, or uptime.
Credential separation, server-side validation, and supported hosted or tokenized flows can reduce application risk, but no PCI, legal, tax, or security certification is implied.
Refunds, disputes, partial payments, taxes, currencies, wallets, retries, grace periods, and access changes are included only when the product rules are defined in scope.
Stripe, PayPal, Mollie, and broader gateway setup are confirmed experience. Representative payment, subscription, webhook, wallet, and SSO projects support the workflow claims; no transaction metrics, provider approvals, or compliance certification are claimed.
Payment Integrations project evidence
Matches are selected from project titles, summaries, categories, and technology lists—not from unrelated generic case studies.
A marketplace ecosystem connecting customer ordering, delivery-zone rules, rider onboarding, mobile APIs, payments, and operational dashboards.
Read case study
A set of payment, subscription, and single-sign-on workflows connecting a community platform with a Laravel SaaS application.
Read case study
A secure prepaid airtime flow with international phone validation, operator detection, amount handling, and transaction feedback.
Read case studyRelevant development services
Stripe, PayPal, Mollie, and other supported gateway setup for checkout flows, recurring plans, wallet logic, transaction records, and payment status handling.
REST, cURL, OAuth, and webhook integrations for payments, Reloadly top-ups, authentication, media, storage, communications, and automation.
New modules, business workflows, portals, dashboards, and backend functionality designed around your existing product.
Systematic diagnosis of PHP errors, JavaScript failures, database issues, broken integrations, and inconsistent production behavior.
Login bridges, WebAuthn passkeys, site two-factor authentication, email verification, role permissions, token flows, and cross-application sign-on.
Payment Integrations delivery process
Credentials are requested only after the scope and access requirement are understood, using an agreed secure channel.
Define product, amount, currency, payer, order or subscription state, access result, cancellation, failure, and administrative visibility.
Confirm Stripe, PayPal, Mollie, or other gateway documentation, account readiness, test mode, credentials, supported methods, webhooks, and return URLs.
Create validated requests, protect credentials, store provider references, and connect checkout or subscription results to internal records.
Verify webhooks or returns, handle delayed or repeated events, and represent pending, successful, canceled, rejected, and failed states clearly.
Exercise provider-supported test cases, affected permissions or access, administrative records, logs, configuration, and deployment notes.
Payment Integrations FAQ
If the exact issue is not covered here, send the current platform behavior and I will say whether it fits the represented work.
Payment Integrations inquiry
Share the platform, gateway, country and currency context, account readiness, checkout or subscription rules, webhook requirements, and the application states you need.