NextJS Development Companies in Paris

Embark on a digital conquest and boost your digital activity!

With over 10 years of experience in IT and CII approved, Josh Digital is among the best next-generation French TECH Agencies, supported by BPI FRANCE, BNP PARIBAS & CCI DE PARIS IDF.

Based on an agile, immersive, collaborative, and responsible approach, we provide high-level digital expertise thanks to our team passionate about new technologies, for the custom development of digital applications in continuous improvement:

* Specific business tools integrated into our clients' IS (BPM, DASHBOARD, EXTRANET / INTRANET, ERP, CRM)

* Mobile / tablet applications on iOS and Android (crossplatform)

* Self-hosted AI Solutions (RAG, LLM/VLM, NLP, DATA, AUTOMOTION, AGENTIC)

* Websites and dedicated platforms (Client areas, Partner areas)

* Proactive, corrective, and evolutive maintenance (TMA / TME)

* Server infrastructure outsourcing and devops

Composed of creative & technical talents with fullstack skills and solid experience (UX/UI Design & IT Development), we aim to be a true extension of your team, adapting to your needs in a collaborative framework, fully engaging in your project.

Josh Digital, in numbers, is:

+20 Employees

+95 Clients

+300 Digital Projects

+50 Mobile Applications

+30 Business Apps

Today, we collaborate with prestigious large companies and innovative startups, such as: BNP Paribas, Nicolas Feuillatte, SNCF, ISS France, Welkeys, Arioneo, Samboat... And many others who have chosen to trust us!

Always seeking innovation, we advise our clients on technological choices and the implementation of their digital projects.

Have a Tech Project to entrust to us? Gain productivity and digital competitiveness now!

#WEARETECH

#WEAREJOSH

Since 2014, Gradiweb has been supporting major E-commerce players in the design, development, and optimization of high-end Shopify sites.

Based in western Paris, our team of Shopify experts implements its know-how in user experience, graphic design, and feature integration to build high-performance sales tools perfectly tailored to needs. Nothing is left to chance; we ensure that the site is SEO-friendly, mobile-first, and fully configurable.

Beyond The Brackets is an IT development agency based in Paris, specializing in the creation of high-impact web, mobile applications, and digital platforms.

Composed exclusively of French engineers, our team designs, develops, and maintains all projects in-house, with a high level of technical and human standards.

We support startups, SMEs, large corporations, and institutions in transforming their ideas into reliable, scalable, and sustainable digital products. Our conviction is simple: technology only has value if it serves a useful, responsible project aligned with the world of tomorrow.

Beyond The Brackets stands out with a product-oriented engineering approach. We work on complex projects in various sectors (finance, automotive, luxury, culture, public services), bringing a long-term vision, solid architecture, and rapid execution capabilities.

Our human-sized agency allows us to be agile, reactive, and fully involved. We work in complete transparency with our clients, as an extension of their teams.

Our methodology is based on three pillars:

Listening, to deeply understand your challenges;

Foresight, through clear and realistic planning;

Transparency, with a structured economic model ensuring a global overview of costs and deliverables.

We use modern and proven technologies: React, Next.js, React Native, Node.js, Nest.js, PostgreSQL, MySQL, and WordPress, to ensure performance, security, and scalability.

Beyond The Brackets is an agency that codes with rigor, thinks with vision, and commits to creating products that matter.

A decade of expertise across all web-related domains, I am passionate about development and the design of Cloud architectures. Certified by emerging leaders like Google and Cloudflare, I hold partnerships with the largest hosting providers, having helped over a hundred clients optimize their environments and online presence.

Let's design your future web project by addressing your product, design, and technical challenges.

Since 2012, JULOA has been supporting startups and companies in their digital transformation, combining strategy, creativity, and innovative technologies.

Based in Toulouse, the agency designs custom digital solutions — mobile applications, software, and platforms — for clients in France and internationally.

From idea to business optimization, we create solutions tailored to your challenges.

Our approach: from problem to solution

You have an idea, a need, or a problem, without necessarily having the technical vision to bring it to life.

JULOA supports leaders, business teams, and project managers in transforming this vision into a clear, useful, and actionable digital product.

We then act as a technical and product partner, from strategic thinking to development, through to the deployment of scalable and sustainable solutions.

Our expertise:

Custom mobile applications & digital platforms

Design and development of mobile applications (iOS, Android) and complex web platforms, from MVP to large-scale products, conceived for projects with significant business stakes.

Software and business solutions

Development of custom software and business tools to automate processes, optimize operational performance, and support growth.

Digital transformation & innovation

Consulting and implementation of solutions integrating automation and artificial intelligence (AI), to structure, modernize, and accelerate your digital uses.

Why choose JULOA?

• A team of experts (developers, project managers, UX designers) who transform your ideas into high-performing digital solutions, for nascent projects or established organizations.

• From consulting to delivery, we create tailor-made projects, focused on user experience and value.

• Mastery of modern technologies, from AI to automation, to keep your company or product at the forefront of innovation.

Nous sommes experts dans le développement d'applications Web, mobiles et IA sur mesure. Spécialistes de l’écosystème JavaScript, nous développons vos projets en React, React Native et autres frameworks modernes, du prototype à la mise en ligne.

Our mission, in short.

We are not an agency that delivers code and disappears. We build products and install the methods so that you can build others without us. Engineering, industrialization, skills transfer. All powered by a mutualized R&D where every project benefits from the work done for all others.

• We build. A new product, a platform, a business component. Regardless of scale. You need it to hold up from day one without burning your budget on foundations. Our technical base absorbs the common infrastructure (auth, CI/CD, monitoring) so that every euro invested serves your business value, not plumbing. What we put in place today is designed for what you will launch in 12 months.
• We modernize. Legacy slows you down. Every new feature takes three times too long, nobody dares to touch the historical code. We audit, prioritize, migrate in blocks without stopping production. No 18-month big bang. Deliverables visible every two weeks, and an IT system that becomes a lever again instead of a burden.
• We structure. You know how to produce, but not yet at scale. Conventions vary from one developer to another, deployments are manual, quality depends on who coded. We intervene on your methods as much as on your code: maturity audit, implementation of standards, pipeline automation, team training. The goal: that your production capacity survives our departure.

Robust and scalable hybrid React & Next.js / React Native architectures that evolve with your business. Real agility and cutting-edge technical support, from product vision to go-live.

More than just an e-commerce agency: we are the unified commerce agency

Our agency helps you meet the challenges of the digital economy and deploy concrete solutions that respond to the latest trends in your customers' behavior: B2C and B2B eshops, PIM/DAM repositories, Click & Collect, and Instore solutions. We are certified partners of Shopify, Magento, Hyva, Contentful, Wordpress, NextJS, and Quable.

With your online customer satisfaction as our priority, we offer a range of solutions that accelerate your omnichannel strategy and place the quality of the user experience at the heart of every project.

For over 15 years, we have certified our teams on partner solutions that have proven their performance. Our expertise allows us to configure each solution as closely as possible to your needs with daily, tailor-made support from our teams.

The alliance of European agility and responsible efficiency.

Based in France with our technical excellence center in Madagascar, we are not a classic outsourcing agency. We are your strategic technology partner, offering world-class infrastructure and high-level talent for your most ambitious projects.

Why choose us for your development?

We have eliminated the traditional offshore barriers to ensure absolute service continuity:

• Total Independence: Our center is 100% autonomous thanks to our own Solar power plant and low-latency Starlink connectivity. Your projects never stop.
• European Standards: We operate with rigorous Agile processes, new IT equipment (latest generations), and project management based in France.
• Premium Talents: Our developers are selected from the top 5% of French-speaking engineers, trained in the latest technologies (React, Node.js, Python, Cloud Native).

Our Areas of Expertise:

• Web & Mobile Application Development: Creation of scalable and intuitive platforms, from design to production delivery. Diverse technical profiles to provide the best solution for your project.
• Talent as a Service (TaaS): Building dedicated squads that integrate natively with your internal teams. Regular reporting and service continuity guarantee included in all services.
• Systems Modernization: Audit and migration of your legacy applications to modern architectures.
• Maintenance & Third-Party Application Maintenance (TMA): Responsive N2/N3 support to ensure the longevity of your tools.

Security at the Heart of Our Processes:

Under a French law contract, we guarantee full GDPR compliance. Your data is secured, your intellectual property is protected, and you benefit from the financial flexibility of our hybrid model without the operational risks.

ArkSystèmes met à profit plus de 15 ans d’expérience en administration système et développement web pour garantir une gestion fluide, fiable et sécurisée de vos infrastructures.

We’re a web development studio that helps startups and brands turn ideas into powerful, scalable web apps.

Whether you're launching an MVP or need a reliable tech team to grow your digital product, we bring the skills to design, build, and deploy fast, responsive, and maintainable solutions.

Our stack? Next.js, React, Tailwind CSS, Node.js — and whatever it takes to ship clean, production-ready code.

We work lean, iterate fast, and always aim for quality over quantity. Let's build something that lasts.

nuances designs custom digital solutions, from product discovery to the extra mile. Specializing in e-commerce and SaaS, we combine technological mastery, intuitive design, product strategy, and continuous optimization (CRO) to transform your projects into impactful and profitable experiences.

What sets us apart:

We have no sales representatives.

We never have.

And we never will.

99% of our revenue comes exclusively from client recommendations and our reputation, which are enough to fill our schedule.

Your future recommendation of our services is our primary criterion for measuring the success of our collaboration.

Know-how: we take ownership of your challenges to make them intimately ours

Business-first: technology only makes sense when it serves the business

Ultra-specialized team: small, responsive team, direct communication, controlled deadlines

Extra-mile commitment: your success is our long-term responsibility

E-commerce & SaaS focus: proven expertise on Shopify platforms, marketplaces, and SaaS applications

Data-driven culture: decisions and iterations guided by analytics and real feedback.

Our potential areas of action:

UI/UX Design & Branding

• Creation of visual identities, Branding & brand platform
• Logo, graphic charter, guidelines.
• Figma wireframes & mockups
• Product Design
• UI/UX conception
• User journeys, interactive prototypes
• UX Research

Technology

• Front-end and Shopify & Shopify+ integration
• Full-stack development (Node.js, React), third-party APIs, back-office, CI/CD, Test Automation
• AI Model training & LLM integration, agent design & development

Product Strategy, CRO & Data

• Product scoping, backlog & user stories, MVP and iterations based on user feedback
• Analytics audit (GA4, Hotjar…), tracking, A/B tests, statistical analyses and conversion optimization
• Project management, QA, empowerment of client teams

We don't just deliver a project.

We create complete digital experiences: e-commerce platforms, mobile apps, web apps, and custom solutions.

At Kreativ Konception, every solution is designed with a user-first approach, optimized for performance, and built to generate real impact on your business.

From prototype to launch, we build scalable solutions ready to evolve with your growth.

Fewer technical constraints, more concrete results.

Most tech projects don't die from a bad idea. They die from poor execution. Unavailable freelancers, agencies deploying juniors, no-code that crashes under load. The market won't wait.

We design, develop, and maintain your web, mobile, or business application with the rigor of an in-house team, the flexibility of a freelancer, and none of the recruitment delays.

A hands-on CTO involved in every project, from architecture to product strategy. No intermediate layer between decision and execution.

100% senior, 0% turnover in 5 years. A stable, seasoned, self-managed team. Code review, automated testing, CI/CD: quality is systematic, not optional.

Operational in 24h, MVP delivered in 2 to 6 weeks. You see the product advance sprint after sprint. You adjust the course continuously.

A business, product, and domain vision. We challenge your functional choices, think about the user experience, and design the interfaces. Not just developers: a product perspective at every stage.

AI integrated where it shines. Conversational agents, AI workflows, RAG, LLMs—we design end-to-end AI systems or integrate AI into an existing product, with rigorous control over costs and results.

A prepared handover. When you are ready to internalize, we help you recruit and organize the handover. Our goal: to make you autonomous, not dependent.

You will love:

• Approved for Innovation Tax Credit (up to 20% reduction)
• 6 months of preventive and corrective maintenance included

ABK Digital designs custom business tools for companies that have outgrown generic software.

Based in Rennes, our team combines business strategy and full-stack development (Next.js, React, Node.js, PostgreSQL) to deliver web applications designed around your real processes—not the other way around.

Our approach: deeply understand your business, identify operational friction, then build the tool that eliminates it. Each project replaces a stack of ill-fitting SaaS with a unique, fast, and scalable solution.

We also handle the migration of existing ecosystems (WordPress to Next.js), the integration of business data flows (API, XML, CRM), and the development of proprietary SaaS products.

What we don't do: churn out brochure websites. What we do: tools that transform how you work.

Appvelvet est un studio de développement d'applications web & mobiles. Les applications sont développées en code natif pour iOS et Android.

Fondé en 2014, le studio privilégie une approche créative et flexible durant le processus de conception des applications.