Next.js Development Services: Fast Websites on Next.js and Sanity

The speed comes from how pages are delivered. Most pages of a marketing site are generated once — at build time or right after an editor publishes a change — and served from a CDN close to the visitor. Nothing is assembled on each request, so there is no database query or theme rendering between the click and the page.

• incremental static regeneration rebuilds a page in the background after an edit, so content stays current and nobody waits for it
• the Next.js image component serves every photo in a modern format at the size the screen actually needs
• fonts are self-hosted and load without shifting the layout
• only the JavaScript a page needs reaches the browser; static sections stay plain HTML

The DJ and producer site I built on Next.js 14 loads in under one second; it replaced slow pages from a website builder. Speed is not an extra line in the quote — it comes from the stack and from keeping the code lean.

In Next.js, SEO lives in the code instead of in a stack of plugins that may conflict after an update. I set it up once, so editors cannot break it by accident:

• titles, descriptions and Open Graph images generated for every page from CMS fields, with fallbacks when a field is empty
• an XML sitemap built from the content itself, so a page appears in it the moment it is published
• hreflang links between language versions and a canonical URL on every page
• JSON-LD structured data for the organization or person, services, articles, FAQs and breadcrumbs, matching what is visible on the page
• readable URLs, 301 redirects managed in one file and real 404 responses for missing pages

Deeper work on large sites — crawl analysis, index coverage, Core Web Vitals across thousands of URLs — is described on the technical SEO services page.

A headless CMS keeps content separate from design. In Sanity your team fills in structured fields — a heading, a price, a list of benefits, a set of FAQs — and the Next.js site decides how they look. Pasting text from a Word document or uploading an oversized photo does not break the page.

• content types are modeled on your site: a service, a case study, an article, a team member, each with only the fields it needs
• a live preview shows the page before it goes public
• images are cropped around a focal point you choose, for every screen size
• translations are linked documents, so it is visible which pages still miss a language

Sanity is my default for Next.js and Sanity builds because its editing studio is code in the same repository and evolves with the site. Other headless CMS options and connections to the systems you already use are covered on the CMS integration and API work page.

My own site runs in English, Polish and Russian; the retail analytics consultant’s site I built has 153 pages in the same three languages; the psychotherapist’s site in Milan runs in Italian and English. In each of them every language has its own URL structure with translated slugs, hreflang tags and a language switcher that leads to the same page in the other language rather than to the home page. Texts are written for each market, not passed through a machine translator. The method in full is on the multilingual website development page.

Next.js runs server code next to the pages, so a website can collect leads and take payments without a separate backend to host and patch:

• forms that send leads to email, WhatsApp or a CRM, with spam protection and analytics events
• Stripe Checkout for courses, consultations or deposits
• access to paid content delivered after a successful payment
• data from external APIs — availability, prices, a listing feed — cached so pages stay fast

For Landi Room, a beauty salon in Warsaw, I built a landing page for an online course on Next.js and Sanity with Stripe Checkout: after paying, the buyer receives a protected link to the video. The first Google Ads campaign to that page brought more than 100 course sales.

Many Next.js projects start as a WordPress site that has become slow or painful to update. The content and the rankings have to survive the move. For Giuseppe, a psychotherapist in Milan, I rebuilt the site on Next.js 16 and Sanity: 468 blog posts migrated, every old URL redirected with a 301 to its new address, structured data added and explicit rules for AI crawlers written. From start to handover it took 44 working days.

Steps of a WordPress to Next.js migration

1. Export posts, pages, images and SEO fields, and convert them into structured CMS content.
2. Map every old URL to a new one, including categories, tags and media attachment pages.
3. Carry over titles and descriptions, then test all redirects on a preview before launch.
4. After launch, watch Search Console for 404 errors and indexing changes for several weeks.

Moves from other platforms follow the same order, described on the website platform migration page.

Next.js does not suit every project. WordPress is the better choice when you rely on a large set of ready plugins, when your team already knows its admin panel, or when a small site will never grow beyond a few pages and needs to launch cheaply. I build on both, and the case from the WordPress side is on the WordPress development services page.

AI assistants and their crawlers read HTML, and many of them do not run JavaScript. A site that assembles its text in the browser can look almost empty to them. A Next.js site rendered on the server or at build time hands over the full text of each page in the first response.

• server-rendered HTML with real headings, lists and tables that a crawler parses without executing scripts
• structured data that names the business, its services and the authors of its articles
• robots.txt rules written explicitly for GPTBot, OAI-SearchBot, PerplexityBot and Google-Extended, so you decide which bots may read and which may use content for training
• an llms.txt file with a short map of the site where it is useful

Giuseppe found me through ChatGPT, and new pages of his rebuilt site already show up in ChatGPT answers. Getting mentioned in AI answers is ongoing work beyond the build; it is described on the AI-ready SEO and GEO optimization page.

A Next.js development company assigns a project manager, a designer and frontend and backend developers. For a website that is often more people than the work needs. I do the design, the code, the CMS setup, the SEO and the launch myself, and you talk to me directly. I have worked in internet marketing since 2010 — first as a copywriter, then in SEO, then in development — so the site is planned around search demand and content, not only around components.

1. Brief and structure: pages, languages, integrations and content types, with a fixed price.
2. Design: the home page and one inner page agreed first, on a phone and on a desktop.
3. Build: Next.js, Sanity, SEO and analytics, with work in progress on a preview URL.
4. Content and launch: content entered or migrated, redirects tested, domain connected.
5. Handover: a short CMS guide, the repository and all accounts in your name.

Hosting usually goes on Vercel, the platform from the company behind Next.js, which builds a preview for every change; other Node.js hosting works as well. Updates and small changes after launch are covered on the website maintenance services page.

My prices are published on the pricing page, and design is included in both ranges:

• A Next.js website or landing page with Sanity CMS, a handful of pages and a contact form: 700–1,400 €.
• A Next.js website with a headless CMS, several languages, integrations such as a CRM or Stripe, or a migration from WordPress: from 2,000 €.

The price depends on the number of templates and content types more than on the number of pages: a blog with 400 posts uses a single article template. A migration adds work on the URL map and content conversion. Hosting and the CMS plan are paid by you directly to the providers, and I tell you the expected running cost before we start.