Technical Audit and SEO Optimization of an OpenCart Website

I conducted a comprehensive technical audit and SEO optimization of an e-commerce website built on OpenCart. I analyzed the homepage, category pages, subcategory pages, and product pages. As a result of the final control tests, the main page types were brought into the green zone in Google PageSpeed Insights across the key metrics: Performance, Accessibility, Best Practices, and SEO. The website also successfully passed all Agentic Web checks — 2 out of 2. The optimization was implemented systematically across the website rather than being limited to a single page. I improved page loading behavior, image delivery, caching, font loading, and third-party scripts. I optimized Core Web Vitals, including LCP, FCP, Speed Index, TBT, and CLS. I also reviewed product indexability, meta robots directives, breadcrumb navigation, and category meta descriptions. In addition, I improved accessibility and the semantic structure of the main interface elements. All changes were validated using Google PageSpeed Insights, HTTP/cURL checks, and testing on both mobile and desktop devices.
Tech stack: OpenCart, PHP, Twig, JavaScript, MySQL/MariaDB, Swiper, Fancybox, HTML5, CSS, WebP, SSH, FTP, Google PageSpeed Insights.