Next.js Development Services

Next.js suits projects that need both fast first loads and rich interactivity: marketing sites where search visibility matters, commerce storefronts, and dashboards that would otherwise be a slow single page application. Its strength is letting you choose rendering per route, so a product page can be statically generated while an account page renders per request. It is less obviously the right answer for a simple brochure site, where a lighter setup is cheaper to run, or for a heavily stateful internal tool with no SEO requirement. We will say so when a plain React or server rendered stack would serve you better.

New builds go on the App Router, which is where React Server Components, streaming and the current data fetching model live, and where the framework’s ongoing development is focused. For existing projects on the Pages Router we do not migrate by default. Both routers can run side by side in the same application, so the pragmatic path is usually to leave working routes alone and build new ones on the App Router, migrating incrementally where there is a real benefit. A wholesale rewrite of routing that already works is a large cost with little user facing return.

By how often the content changes and how personal it is. Content that is the same for everyone and changes rarely is statically generated at build time, which is the fastest and cheapest to serve. Content that changes often but is still shared, such as a product catalogue, uses incremental static regeneration so pages rebuild in the background without a full deploy. Anything genuinely per user, like a cart or an account area, renders on request. Getting this split right is most of the performance work on a Next.js site, and getting it wrong is the usual cause of a slow one.

We build against Google’s published thresholds: Largest Contentful Paint under 2.5 seconds, Interaction to Next Paint under 200 milliseconds and Cumulative Layout Shift under 0.1, all measured at the 75th percentile of real users. Interaction to Next Paint replaced First Input Delay in March 2024 and is the stricter of the two, so JavaScript volume matters more than it used to. In practice the work is disciplined use of the image component, keeping client side JavaScript off routes that do not need it, and reserving space for anything that loads late. We measure on field data, not just a lab score.

Yes, and that is the usual arrangement rather than an exception. Next.js is a front end framework, so it consumes whatever you already run: WordPress, a headless CMS, Magento or Adobe Commerce, Shopify, or your own API over REST or GraphQL. Your editors keep the interface they know and your catalogue, pricing and order logic stay where they are. This is also the lower risk way to modernise, because you are replacing the presentation layer rather than the system of record. If the backend genuinely is the problem, that is a separate conversation and we will frame it as one.

You own it from the first commit, in your own repositories, under NDA with IP assignment in the statement of work. Handover is not a single event at the end: because you hold the repository throughout, your team can read the code as it is written. We document the rendering decisions per route, the environment variables and the deployment pipeline, since those are what a new developer needs and what is least obvious from the source alone. The intent is that your team, or another agency, can take the project forward without needing us to explain it.