Rajeev K.

I am a Senior WordPress and WooCommerce Engineer with 6+ years of experience specializing in custom plugin development, high-volume payment gateway architectures and multi-platform API integration layers. I build secure, optimized, and deeply integrated digital ecosystems that connect core CMS web applications to external business software. My portfolio includes deploying advanced API sync pipelines between systems like Mindbody, GoHighLevel, ServiceM8, Brevo and Google Calendar. Core Technical & Integration Competencies: * Custom WooCommerce & Plugin Engineering: Architectural customization of the WooCommerce core, checkout/cart hook implementations, custom plugin development, theme optimization, and resolving deep-seated PHP runtime errors or conflicts. * Advanced API & Webhook Implementations: Designing secure REST API connections, setting up OAuth 2.0 authentication handshakes, managing webhooks, parsing complex JSON arrays, and ensuring reliable data delivery between web platforms and external SaaS apps. * Secure Payment Gateway Integrations: Flawless setup and debugging of multi-currency enterprise payment processors (Stripe Custom, PayPal Smart Buttons, Authorize.Net, Square, and BNPL frameworks like Klarna/Affirm) with bulletproof checkout logging to prevent payment glitches. * Multi-Step Workflow Automation: Offloading heavy server-side processes by setting up automated business triggers and background sync schedules using n8n, Make (Integromat), Zapier, and native WordPress crontabs. * Structural Performance Optimization: Maximizing Core Web Vitals, database indexing, asset minification, browser caching policies, and server-side script debugging to ensure instantaneous page rendering and secure transaction processing. Comprehensive Technical Matrix: • Primary Platforms: WordPress, WooCommerce Core, WooCommerce Plus, BigCommerce • Architecture Languages: PHP, JavaScript (ES6+), jQuery, SQL, HTML5, Semantic CSS3 • APIs & Middleware: WordPress REST API, JSON, Webhooks, OAuth 2.0, Google Calendar API • Automation & CRMs: n8n, Make, Zapier, GoHighLevel, Brevo, HubSpot, ServiceM8, Mindbody • Payment Endpoints: Stripe API, PayPal SDK, Authorize.Net, Square, Klarna I focus on writing clean, object-oriented PHP code that strictly follows WordPress Core developer standards and secure security practices. All integration systems are deployed with comprehensive error log monitoring and automatic retry logic for API webhooks. Drop your custom integration blueprint or site bottlenecks here to clear your technical debt and scale your digital infrastructure.