# Freelance React & Next.js Developer

> Freelance React and Next.js developer: web apps, dashboards, SSR/SSG websites that are fast and rank well. Clean, documented TypeScript. Quote within 12 hours.

Page: https://eldev.fr/en/technologies/react-nextjs/ · Version française: https://eldev.fr/technologies/react-nextjs/index.md · [Home](https://eldev.fr/en/index.md)

React for the interface, Next.js for server rendering, routing and SEO: this is the stack we reach for when a [web application](https://eldev.fr/en/services/web-development/index.md) needs to be rich for users and serious for search engines. We have shipped React projects since its early versions, with one rule: code your team can take over.

## What we do

### Web apps and dashboards

Reactive business interfaces, dashboards, back-offices: React for state and components, TypeScript for reliability, tests on the critical flows.

### SEO-driven Next.js websites

App Router, server or static rendering per page, optimised images, metadata and structured data: a Next.js site that ranks, not just one that renders.

### Takeover and migration

Audit of an existing React codebase, version upgrades (Pages to App Router, class components to hooks), performance and accessibility brought back to standard.

### APIs and integrations

Next.js route handlers or a dedicated Node API, authentication, Stripe payments, headless CMS: the whole application, not just the front end.

## What React changes for your product

A React application is built from components: every piece of interface is isolated, testable and reusable. That is what lets a product evolve for years without a rewrite. Next.js adds what React lacks for a public website: server-side rendering for Google and social networks, file-based routing, automatic image and font optimisation.

## How we run a React project

Scoping of screens and flows, rendering choice page by page (static, server or client), strict TypeScript and tests from the first sprint, deliveries every one to two weeks on a staging environment. When the back end outgrows route handlers, it moves to a dedicated [Node.js API](https://eldev.fr/en/technologies/nodejs/index.md). At delivery: Git repository, installation and deployment documentation, and a pass on Core Web Vitals.

## Stack & tools

React 19, Next.js 15, TypeScript, TanStack Query, Zustand, Tailwind CSS, Vitest, Playwright, Vercel, Node.js

## Why ELDEV

We do not sell React by reflex. For a brochure site we will tell you Astro is the better fit; for an application with lots of state and interaction, React and Next.js are the right tool and we know them deeply: component architecture, state management, performance (Core Web Vitals), accessibility, testing. One point of contact from scoping to production, and documented TypeScript any team can pick up.

## Frequently asked questions

### React or Next.js: what is the difference for my project?

React is the UI library; Next.js is the framework around it: routing, server rendering, image optimisation, APIs. An internal app behind a login can live on React alone; a public site that Google must index needs Next.js (or [Astro](https://eldev.fr/en/technologies/astro/index.md) when the content is mostly static).

### How much does a custom React application cost?

It depends on the number of screens, the integrations (payments, CRM, third-party APIs) and the back-office. A free scoping call gives you a precise quote: [get in touch](https://eldev.fr/en/contact/index.md), reply within 12 hours.

### Can you take over an existing React application?

Yes. We start with an audit (dependencies, architecture, performance, technical debt), then propose a plan: targeted fixes, version upgrade or partial rewrite. The takeover happens without downtime and can continue under a [maintenance](https://eldev.fr/en/services/maintenance/index.md) contract.

### Do you host Next.js applications?

We deploy to Vercel, to a VPS running Node.js or into a container depending on your cost and data constraints. The choice is made at scoping, see our [hosting and infrastructure](https://eldev.fr/en/services/hosting-infra/index.md) service.

## Related pages

- [Freelance Astro Developer](https://eldev.fr/en/technologies/astro/index.md)
- [Freelance Node.js Developer: APIs and Back-ends](https://eldev.fr/en/technologies/nodejs/index.md)
- [Freelance React Native Developer](https://eldev.fr/en/technologies/react-native/index.md)
- Related service : [Web Development](https://eldev.fr/en/services/web-development/index.md)

## Contact

[Contact form](https://eldev.fr/en/contact/index.md) (HTML page: https://eldev.fr/en/contact/) · Email: contact@eldev.fr · First chat is free. Response within 12 hours on business days.