In e-commerce, performance is not a technical nicety, it is revenue. A catalogue page that takes four seconds on mobile loses people who were ready to buy. I work on the parts of a store where that actually gets decided: catalogue and search rendering, image delivery, and the path from product page to completed checkout. Sometimes that means optimizing the PrestaShop store you already have; sometimes it means putting a Next.js storefront in front of it.
Most stores obsess over the product page and neglect the category and search pages, which is where browsing customers actually spend their time. Those pages have to render dozens of images and filters quickly on a phone. Getting image formats, sizes and lazy-loading right there moves conversion more than most redesigns.
A headless storefront gives you a fast, fully controlled Next.js frontend while the commerce backend keeps handling orders, inventory and payments. It is a real gain for stores with traffic and a design that a theme cannot express. It is overkill for a small catalogue running fine on a standard theme, and I will say so.
Product, offer, availability and review markup are how your listings get prices and stock status in the search result itself. That is a click-through difference on queries you already rank for — the cheapest organic win available to a store, and one that is very often simply missing.
PrestaShop and WordPress-based commerce are where I have the most depth, plus headless setups where a Next.js frontend sits on top of a commerce API. If you are on a platform I have not named, tell me which — the frontend and integration work transfers.
Usually yes, and it is the first thing worth trying. Catalogue rendering, image delivery, script bloat and checkout friction can all be addressed on the existing platform. A rebuild is a last resort, not an opening move.
Yes — payment providers, shipping calculators and ERP or inventory synchronization. This is backend work against documented APIs, with proper handling of the failure cases that only appear in production.