PRABU K.

eCommerce Payment Gateway Engineer | WooCommerce & Odoo

I specialize in building and maintaining complex eCommerce payment, subscription, API, shipping, and custom platform integrations for businesses that need reliable production-ready solutions—not just basic plugin configuration. My work focuses on the technically difficult side of eCommerce development: integrating payment providers, implementing recurring billing and tokenization, developing custom modules, upgrading legacy integrations, resolving compatibility issues, and making existing systems work correctly with modern platform architectures. I have extensive hands-on experience across WooCommerce, Odoo Enterprise, Magento, PrestaShop, OpenCart, WHMCS, WordPress, and Drupal Commerce. What I Specialize In Payment Gateway & Payment Infrastructure Custom payment gateway and payment provider development Payment API, webhook, callback, and signature verification implementation Subscription and recurring payment systems Tokenization and saved payment methods Payment status synchronization and transaction workflows Refunds, captures, authorizations, and payment lifecycle handling Multi-platform payment gateway integrations Advanced eCommerce Engineering WooCommerce custom plugin development Odoo Enterprise eCommerce and POS payment providers Magento and PrestaShop module development Checkout customization and payment-flow modifications WooCommerce Checkout Blocks / React compatibility WooCommerce HPOS compatibility Third-party plugin compatibility and conflict resolution Legacy module upgrades and platform version migrations API, Shipping & Business Integrations Shipping carrier and delivery API integrations Supplier, warehouse, dropshipping, and fulfillment integrations External API synchronization Custom business logic and automation Webhooks, background processing, and data synchronization Selected Recent Engineering Work Developed Odoo Enterprise payment providers across versions 15, 16, 17, 18, and 19 Developed Odoo POS payment integrations for multiple Odoo versions Implemented Odoo subscription, recurring billing, and tokenization functionality Developed Drupal Commerce payment integrations for Commerce 2.x and 3.x Integrated recurring payment functionality into WooCommerce gateways Updated payment plugins for WooCommerce Checkout Blocks and HPOS Developed WooCommerce shipping integrations including DoorDash Drive, Trexity, DHL Express, and Poste Italiane Developed and maintained payment modules for PrestaShop, Magento, WooCommerce, OpenCart, and WHMCS Worked on official marketplace extension compliance, coding standards, security recommendations, and approval requirements Developed custom modules, APIs, upgrades, and troubleshooting solutions for established eCommerce systems Why Clients Hire Me I am particularly useful when a project involves: An existing payment gateway that needs modification A payment provider that must support recurring billing or tokenization A custom integration that does not work with the latest platform version A complex webhook or payment-status issue A plugin conflict affecting checkout or product functionality A legacy module that needs upgrading A third-party API that must be integrated into an existing eCommerce system A production issue where understanding the existing architecture matters more than writing quick code I work comfortably with existing codebases, platform conventions, third-party dependencies, and production environments. My approach is to understand the actual business and technical requirements, identify the correct integration point, and deliver a maintainable solution that works with the platform rather than fighting against it. If your project involves payment infrastructure, custom eCommerce engineering, complex API integration, or a difficult platform compatibility problem, I would be happy to discuss it.