Pavel K.

Need an experienced developer to fix, extend, or optimize your WordPress, WooCommerce, or Shopify website? I'm a Senior Full-Stack Developer with 12+ years of experience building and maintaining websites, e-commerce platforms, and custom business solutions. I specialize in solving technical problems that standard plugins and themes can't handle, from complex WooCommerce checkout workflows to third-party API integrations and performance optimization. What I can help you with WordPress & WooCommerce Development - Custom WordPress plugins and themes - WooCommerce checkout and cart customization - Custom shipping methods, payment integrations, and order processing - Inventory synchronization and product management - Gutenberg blocks, ACF, WPML, and REST APIs - Troubleshooting, maintenance, and upgrades Shopify Development - Custom Liquid sections and storefront functionality - Cart customization and product-specific features - Shopify Markets and multi-language localization - Third-party integrations and API development - Storefront performance optimization API Integrations & Automation - REST API development and integration - Payment gateways, shipping providers, and CRM integrations - Custom reporting and data synchronization - Business workflow automation Performance Optimization & Troubleshooting - WordPress and Shopify performance improvements - Core Web Vitals and PageSpeed Insights optimization - Database queries, caching, and frontend assets - Debugging complex production issues Selected results - Improved WordPress PageSpeed Insights scores from 45 to 98. - Improved Shopify PageSpeed Insights scores from 27 to 62 on mobile and 53 to 82 on desktop. - Built 40+ automated reporting solutions. - Integrated 30+ third-party APIs. - Reduced development and delivery time by approximately 70% through workflow automation and AI-assisted development. Technologies PHP 8.x, WordPress, WooCommerce, Shopify Liquid, JavaScript, React, MySQL, MariaDB, REST APIs, Git, Docker, and Cloudflare. How I work I take ownership of technical tasks from requirements analysis through implementation, testing, and deployment. I focus on maintainable code, clear communication, and solutions that fit your business requirements rather than adding unnecessary complexity. Whether you need to fix an existing website, build custom e-commerce functionality, integrate an external service, or improve performance, I'd be happy to discuss your project.