Next.js development company: fast, search-friendly sites, marketplaces and SaaS front ends

What do our Next.js development services include?

Next.js development services cover building React applications that render on the server or at build time, so public pages load fast and rank in search. We use Next.js for the parts of a product that must be found and must feel instant on the first visit: marketing sites, marketplace listings, catalogs, public profiles and content hubs. The back end, usually Symfony or Node.js, is built by the same team.

A typical Next.js engagement covers:

• Public sites and landing pages with server rendering or static generation, structured data and Core Web Vitals checked in CI.
• Marketplaces and catalogs: listings, categories, search pages, public profiles and booking or checkout flows.
• SaaS front ends where public pages and the logged-in app live in one codebase.
• Internationalization: localized routes, hreflang tags and translated content.
• Integrations with a headless CMS, your API, payments and analytics.
• Design systems shared between the Next.js site and the rest of the product.

For logged-in products without a public side, plain React is often simpler; see React development.

When should you choose Next.js?

Choose Next.js when search traffic or first-visit speed matters for the business. If customers find you through Google or AI assistants, the pages they land on must deliver full HTML and load fast on a mid-range phone. Next.js does that by rendering on the server or ahead of time, then hydrating into a React app.

How do you make Next.js sites rank and load fast?

A Next.js site ranks and loads fast when SEO and performance are part of the build plan, not a checklist after launch. The framework gives the tools; the result depends on how pages are structured and what each one ships to the browser.

Our defaults on every Next.js project:

1. Server components and static generation for content pages, so the browser downloads as little JavaScript as possible.
2. Unique metadata per page: title, description, canonical URL, Open Graph and structured data generated from the content.
3. Sitemaps and hreflang generated from real routes, with real last-modified dates.
4. Image and font optimization: correct sizes, modern formats and no layout shift.
5. Performance budgets: Core Web Vitals and bundle size checked in CI for key templates.
6. Caching strategy agreed per page type: static, regenerated on a timer, regenerated on change, or rendered per request.
7. Crawlable internal links and clean URLs, so both search engines and AI crawlers can follow the structure.

We use AI coding agents for routine work such as page templates, tests and refactors, with senior engineers reviewing every change.

How do you build a marketplace with Next.js?

A marketplace in Next.js is two products sharing one design system: public pages that must rank and convert, and a workspace where buyers, sellers and admins manage listings, bookings and messages. We build the public side with server rendering and caching, and choose for the workspace between the same Next.js app and a separate React app, depending on size and team.

The back end handles what the browser should never own: payments and payouts, search indexes, messaging, moderation, roles and notifications. That is usually Symfony for business-heavy marketplaces or Node.js for JavaScript-first teams; see Node.js development and Symfony development.

Examples from our published work where Next.js is in the stack:

• Freelance experts platform: we rebuilt the public web experience of a French IT consultant marketplace after a rebrand, including the design system, landing pages, freelancer search, public profiles and authentication flows, with desktop and mobile versions of every screen. It was delivered within a fixed scope, and the client's team now reuses the Figma design system for new pages.
• Kodcy: our own pet-boarding marketplace with iOS and Android apps, a map of nearby hosts, real-time chat and flexible search, plus a landing page and launch campaign, built in about three months.
• Task management system for a telecom support team in France, on React, Next.js and Node.js, with Keycloak authentication, roles and third-party alarm intake.

Can you migrate an existing site or React app to Next.js?

Yes. Migrations to Next.js usually come from a client-rendered React app that does not rank, or a CMS theme that has become slow and hard to change. We migrate page type by page type, keeping URLs stable or redirecting them one to one, so search rankings are not lost in the move.

The process: inventory every URL and its traffic, decide the rendering model per page type, rebuild the templates and shared components, set up redirects and metadata, then switch traffic in stages while watching Search Console and Core Web Vitals. Logged-in parts of the app can stay as they are and move later, or not at all.

What does a Next.js site need after launch?

A Next.js site needs regular framework and dependency updates, monitoring of Core Web Vitals and search performance, and a content workflow that does not depend on developers for every change. Next.js releases often, and staying a few versions behind makes each later upgrade harder.

After launch we usually agree a light support plan: dependency and security updates on a schedule, a monthly check of Search Console and Core Web Vitals, fixes for crawl or indexing problems, and new page types as the marketing team needs them. When content changes daily, we connect a headless CMS so editors publish without a release. If the site is part of a larger product, the same team keeps working on the app and the back end as well.

How much does Next.js development cost?

Next.js development cost depends on the number of page types, integrations and whether a back end is part of the scope. As orientation, with us a web app or public site with a back end typically costs $10,000 to $15,000, an MVP $10,000 to $50,000 with most at $10,000 to $20,000, and a full online business with web and mobile apps, admin, payments and integrations $35,000 to $70,000. For ranges by project type and a comparison with US and UK agencies, see React development cost.

How we work on Next.js projects

We start with a short scoping call about the product, the audience and how customers find you today. From that we agree the page types, the rendering model, the back end and the first milestone, with a fixed quote. The build runs in milestones with a weekly demo, in your repositories and hosting accounts, with SEO setup and analytics included. After launch we continue as your team, or hand over with documentation. If you are building a subscription product, see SaaS development.

Tell us what you are building on our contact page, or describe the scope in our project estimate form.