PrestaShop 8 Developer — Custom Mobile-First Theme & PageSpeed Optimization

I’m looking for an experienced PrestaShop developer to build a new custom e-commerce theme from supplied HTML/CSS mockups, a design system and visual assets. The goal is a fully functional, editable PrestaShop 8 storefront that closely matches the designs. Approximately 90% of the store’s traffic comes from mobile devices, so mobile usability and loading performance are our highest priorities. Scope of work - Set up and configure a clean PrestaShop 8 environment. - Build the custom theme, including the header, navigation, footer and reusable components. - Integrate the homepage. - Implement category listings, search, filters and product cards. - Build product pages with galleries, variants, technical information and related products. - Integrate a product configurator or bundle builder using supplied business rules. - Configure cart, checkout, payment and shipping flows. - Integrate customer account pages, quote requests and core content pages. - Configure essential modules and adapt their frontend appearance. - Complete functional testing, resolve issues and deploy to the agreed environment. The exact page inventory, module requirements and functionality will be agreed upon before development. Data migration is outside the scope. Mobile experience and performance Key requirements: - Accurate implementation of the supplied mobile and desktop designs. - Comfortable touch navigation and mobile-friendly forms. - Compatibility with Safari on iOS and Chrome on Android. - No unintended horizontal scrolling or disruptive layout shifts. - Responsive, optimized images. - Efficient loading of JavaScript, CSS, fonts and media. - Careful management of module and third-party script overhead. Our target is a Google PageSpeed Insights Performance score of 95+ on mobile and desktop for the main public pages, approaching 100 where feasible. Results must be measured on a production-like environment with the required features and scripts enabled. Please identify any hosting or third-party dependencies that could affect the target and explain your optimization approach. ]What I will provide - HTML/CSS mockups and the design system. - Available images, fonts and visual assets. - Business rules and functionality requirements. - Access to the development environment. - Direct feedback and milestone approvals. Expected deliverables A functional, responsive and editable PrestaShop 8 storefront, tested and deployed to the agreed environment. Agreed editorial sections must be manageable through the back office. Attention to detail matters throughout this project. Please begin your application with the exact word PRESTATHEME so I can confirm that you have read the full brief. Deliverables also include: - All source code in a shared Git repository, updated throughout the project. - Installation and deployment instructions. - A list of required modules, dependencies and licenses. - A short handover guide for editable content. - Functional testing and performance results. Required experience - Proven experience building custom PrestaShop 8 themes. - Strong PHP, Smarty, HTML, CSS and JavaScript skills. - Solid understanding of PrestaShop hooks, modules and checkout flows. - Demonstrable mobile-first development and PageSpeed optimization experience. - Experience with product configurators, bundles or complex product pages. - Clear communication and early reporting of blockers. AI-assisted development tools are welcome, provided you understand, review and take responsibility for the delivered code. Timeline and collaboration We are targeting delivery within one week — 5 business days. Please review the supplied designs and scope before confirming that you can meet this deadline. Clearly identify any items that would require additional time. I will be your direct contact for technical coordination and approvals, with prompt feedback throughout the week. I expect: - Daily progress updates. - An accessible staging environment throughout development. - Clearly defined implementation, testing and deployment milestones. - Milestone-based approvals and payments. Please submit a fixed-price estimate with clear assumptions, exclusions and any additional module or license costs. To apply Please include: 1. Two or three relevant PrestaShop projects, with links and your exact contribution. 2. A performance optimization example, ideally with mobile before-and-after results. 3. Your proposed technical approach for this project. 4. Your availability and a realistic delivery plan for the 5-business-day target. 5. Your indicative fixed-price budget and what you need to review before confirming it. I will prioritize specific proposals with verifiable work samples and a clear understanding of the mobile and performance requirements.