# Web Development > Custom websites and web apps, fast and SEO-optimized. From showcase sites to SaaS platforms, clean code built for your goals. Free quote. Page: https://eldev.fr/en/services/web-development/ · Version française: https://eldev.fr/services/developpement-web/index.md · [Home](https://eldev.fr/en/index.md) We design custom websites and applications that are high-performing, SEO-optimized and built to last. From landing pages to showcase sites, blogs to complex SaaS platforms, each project is developed with the technologies best suited to your goals: [React, Next.js](https://eldev.fr/en/technologies/react-nextjs/index.md), Astro, Vue.js or Node.js. Our approach combines [thoughtful design](https://eldev.fr/en/services/ui-ux-design/index.md), clean code and SEO best practices to deliver a digital product that stands out and drives real results from day one, on a [reliable, optimized infrastructure](https://eldev.fr/en/services/hosting-infra/index.md). ## Capabilities ### Showcase sites Business pages, portfolios and institutional sites with professional design. Every page is crafted to reflect your brand identity and build trust with visitors at first glance. ### Landing pages Conversion-optimized landing pages for your marketing campaigns. Structure, copywriting and calls-to-action are tested to maximize your return on investment. ### Web apps Complex web applications: dashboards, business tools and SaaS platforms. Scalable architecture, robust APIs and responsive interfaces to deliver the best experience to your users. ### Performance Optimized code, minimal loading times and technical SEO built in from the first line. Every delivery is audited to ensure high Lighthouse scores and strong Google rankings. ## Who is this service for? You need a custom website that actually performs, not another templated landing page. Whether you run a [law firm](https://eldev.fr/en/sectors/lawyers/index.md), a trade business or a startup, the goal is the same: a site that brings in clients. - [Early-stage startup](https://eldev.fr/en/sectors/startups-saas/index.md) shipping a first version or MVP to validate your idea - Established business, from [trades and construction](https://eldev.fr/en/sectors/trades-construction/index.md) to professional services, with an outdated website ready to move to a modern, faster stack - Project requiring a web app, SaaS platform, or custom business dashboard backed by a [Node.js API](https://eldev.fr/en/technologies/nodejs/index.md) - Site that loads slowly or ranks poorly and is costing you traffic ## How it works. Every project starts with a discussion to understand your needs and goals. Together we define the scope, key features and timeline. Development moves forward in iterations with regular check-ins, and we deliver a tested, optimized product ready to perform. ## What makes the difference. Clean, maintainable code, measured performance and technical SEO built in from the first line. We don't just deliver a website: we deliver a tool designed to last and grow with your business. ## Frequently asked questions. ### How much does a custom website cost? Every project is different, from a simple showcase site to a full SaaS platform. We send a detailed, free quote after a scoping call, [reach out](https://eldev.fr/en/contact/index.md) and get an estimate within 12 hours. ### How long does it take to build a website? A showcase site typically ships in 2 to 4 weeks. A landing page can be ready in 5 to 10 days. A web app or SaaS platform takes 4 to 12 weeks depending on complexity. Timelines are set at kickoff and kept on track through short, focused iterations. ### Which technology should I choose for my project? It depends on your goals: [Astro](https://eldev.fr/en/technologies/astro/index.md) for a fast, SEO-friendly showcase site; Next.js or Nuxt for server-rendered apps; React or Vue for interactive dashboards and SaaS products; Node.js for a robust API backend. We recommend the right stack for your use case, no defaults pushed on you. ### Can you migrate or take over an existing website? Yes. We can audit your current site, pick up an existing codebase, or migrate your content from [WordPress](https://eldev.fr/en/services/wordpress-cms/index.md), Wix, Squarespace or any other platform to a modern stack. Migrations are planned to avoid downtime and protect your existing SEO rankings. ### Is SEO included in the development? Technical SEO is built in by default: semantic HTML, meta tags, Core Web Vitals performance, sitemaps and structured data. For a content-driven SEO strategy or a redesign focused on organic growth, we pair web development with [UI/UX design](https://eldev.fr/en/services/ui-ux-design/index.md) to maximize impact from day one. ## Technologies & industries - [Freelance React & Next.js Developer](https://eldev.fr/en/technologies/react-nextjs/index.md): 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. - [Freelance Astro Developer](https://eldev.fr/en/technologies/astro/index.md): Freelance Astro developer: ultra-fast brochure sites, blogs and multilingual websites, top Lighthouse scores, migration from WordPress. Free quote within 12 hours. - [Freelance Node.js Developer: APIs and Back-ends](https://eldev.fr/en/technologies/nodejs/index.md): Freelance Node.js developer: REST and GraphQL APIs, authentication, webhooks, third-party integrations, PostgreSQL. Robust, documented back-ends. Quote in 12 hours. - [Websites for Law Firms and Lawyers](https://eldev.fr/en/sectors/lawyers/index.md): Website for lawyers: firm presentation, practice areas, appointment booking, compliance with French bar rules and GDPR. Freelance developer, quote within 12 hours. - [Websites and Apps for Healthcare Professionals](https://eldev.fr/en/sectors/healthcare/index.md): Websites and apps for practices, clinics and healthcare professionals: appointment booking, protected health data (GDPR, French HDS hosting), accessibility. - [Real Estate Websites: Agencies, Developers, Property Managers](https://eldev.fr/en/sectors/real-estate/index.md): Custom real estate website: listings synced with your agency software, map search, online valuation, French Hoguet law notices. Quote within 12 hours. - [Websites for Hotels and Tourist Accommodation](https://eldev.fr/en/sectors/hotels/index.md): Website for hotels, B&Bs or residences: direct booking connected to your channel manager, multilingual, photos, seasonal rates, local SEO. Quote in 12 hours. - [Websites for Restaurants](https://eldev.fr/en/sectors/restaurants/index.md): Restaurant website: menu updated in two minutes, table booking, click & collect, Google profile in sync, photos that make people hungry. Quote in 12 hours. - [Development for Startups and SaaS](https://eldev.fr/en/sectors/startups-saas/index.md): Freelance developer for startups: an MVP shipped fast on an architecture that holds, multi-tenant SaaS, authentication, billing. Quote within 12 hours. ## Other services - [E-commerce](https://eldev.fr/en/services/e-commerce/index.md): Stores that convert - [Mobile Apps](https://eldev.fr/en/services/mobile-apps/index.md): iOS & Android - [Artificial Intelligence](https://eldev.fr/en/services/artificial-intelligence/index.md): Automation & chatbots - [UI/UX Design](https://eldev.fr/en/services/ui-ux-design/index.md): Memorable interfaces - [WordPress & CMS](https://eldev.fr/en/services/wordpress-cms/index.md): Content management - [Desktop Apps](https://eldev.fr/en/services/desktop-apps/index.md): Cross-platform desktop - [Hosting & Infra](https://eldev.fr/en/services/hosting-infra/index.md): Servers & deployment - [Maintenance](https://eldev.fr/en/services/maintenance/index.md): Ongoing support - [ERP & Consulting](https://eldev.fr/en/services/erp-consulting/index.md): Integrated management & audit - [Website Repair](https://eldev.fr/en/services/website-repair/index.md): Emergency, picked up within 2 hours ## 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.