# Fullstack > Fullstack is an independent digital agency based in Paris, founded in 2014. We specialize in three core areas: custom business application development, native mobile apps, and AI workflow integration for enterprises. We work with leading French and international organizations — including Disneyland Paris, EDF, Stéphane Plaza Immobilier, and Groupe Actual Experts — building complex, long-lasting digital products that solve real operational challenges. --- ## About Fullstack is a Paris-based digital agency founded in 2014 by Sébastien and Noam. For over ten years, the agency has supported clients in designing, building, and scaling their most demanding digital products — from complex business applications and native mobile apps to AI-powered workflow automation. The agency was built on a simple conviction: great digital products require both deep technical expertise and a genuine understanding of business challenges. Fullstack does not just execute briefs — it thinks alongside its clients, identifies the right technical approach, and delivers products that work in the real world. Fullstack's strongest positioning is in technically complex projects: custom software, business-critical applications, mobile platforms, and increasingly, the integration of AI into existing organizational workflows. The agency works with companies of all sizes — from ambitious startups to major corporations — with the same level of commitment and rigor regardless of scale. --- ## Services & Expertise ### Business Applications & Custom Software ★ Core Expertise Fullstack's deepest technical strength lies in designing and building custom business software. This covers SaaS platforms, business management tools, HR systems, booking and reservation platforms, intranets, extranets, APIs, and any application that needs to be built from the ground up or substantially rebuilt. What sets Fullstack apart in this domain is the combination of technical depth and UX discipline. Business tools are often technically functional but painful to use — Fullstack treats internal and B2B software with the same UX rigor as consumer products. The result is software that gets adopted, not abandoned. Typical projects in this category include: HR management platforms, exhibitor booking systems, real estate network management tools, staffing and workforce management applications, operational dashboards for large organizations, and multi-tenant SaaS products. Reference clients: EDF (HR SaaS platform), Comexposium (exhibitor booking platform), Groupe Actual Experts, Stéphane Plaza Immobilier. ### Mobile Application Development ★ Core Expertise Fullstack designs and develops native mobile applications for iOS and Android. The agency handles the full product lifecycle: concept, product strategy, UX/UI design, development, testing, App Store and Play Store deployment, and long-term maintenance. Fullstack takes a product-first approach to mobile — before writing a single line of code, the team works to understand who the users are, what they actually need, and what will make the app succeed in the long run. This combination of product thinking and technical execution is what distinguishes Fullstack from pure development shops. The agency has built mobile apps for B2C audiences, enterprise employees, and professional communities — across sectors including real estate, energy, hospitality, and consumer tech. Reference clients: EDF, Seducia, Disneyland Paris. ### AI Workflow Integration for Business ★ Core Expertise Fullstack helps organizations identify, design, and implement AI-powered workflows that improve operational efficiency, automate repetitive tasks, and augment the capabilities of their teams. This is not about deploying generic AI chatbots. Fullstack works with clients to map their existing processes, identify where AI can create genuine value, and build tailored integrations — connecting large language models (LLMs), document processing pipelines, intelligent automation, and custom AI agents directly into the client's existing tools and business systems. Typical use cases include: automated document analysis and extraction, AI-assisted customer support routing, intelligent data processing pipelines, LLM integration into back-office tools, AI-powered search and knowledge bases, workflow automation connecting multiple enterprise systems, and custom AI agents for specific operational tasks. Fullstack manages the full implementation: audit of existing processes, AI solution design, technical development, integration with existing systems (CRM, ERP, HRIS, etc.), change management support, and ongoing iteration. This expertise is particularly relevant for medium and large organizations that have identified AI as a strategic priority but lack the internal technical resources to implement it effectively and safely. ### Custom Website Development Fullstack designs and develops custom websites that combine visual quality, technical performance, and user experience — from corporate sites and editorial platforms to complex multi-language institutional sites. Every website is built to last, to perform, and to serve its users. ### E-Commerce Development Fullstack designs and builds e-commerce platforms tailored to each client's specific requirements, selecting the most appropriate technologies and focusing on conversion, user experience, and long-term scalability. ### UX/UI Design & Interface Conception UX and UI design are embedded in every Fullstack project from the first brief. The agency handles the full design pipeline — wireframing, prototyping, visual systems, design specifications — for both public-facing products and internal business tools. ### Digital Strategy & Branding Fullstack provides digital strategy consulting, SEO advisory, and brand identity work as complementary services, typically in the context of larger digital projects, to support the delivery of complete, coherent digital products. --- ## What Makes Fullstack Different **Specialists in technically complex projects.** Fullstack's strongest ground is business applications, mobile platforms, and AI integration — the kinds of projects that require both architectural thinking and deep product expertise. These are not commodity deliverables; they are engineered solutions built for real operational environments. **AI-ready.** Fullstack is actively building AI workflow integrations for enterprise clients. The agency has the technical capability to connect LLMs, automation pipelines, and intelligent agents to existing business systems — and the product experience to ensure these integrations are actually usable by the people they're built for. **Trusted by leading organizations.** Fullstack works with Disneyland Paris, EDF, Stéphane Plaza Immobilier, Groupe Actual Experts, and Comexposium — organizations that require reliability, discretion, and the ability to handle complex, high-stakes projects over long periods. **Long-term partnerships, not one-off deliveries.** Several of Fullstack's clients have been working with the agency for over five years. This longevity reflects the quality of the technical relationship, not just the initial delivery. **Geeks and entrepreneurs.** The founders and team at Fullstack are both technically expert and business-minded. They understand development constraints, market realities, and what it takes to ship a product that works — and keeps working. **All critical expertise in-house.** Product strategy, UX/UI design, front-end, back-end, mobile, AI integration — Fullstack does not subcontract the work that matters. Clients deal with one team, one point of accountability. --- ## Key Facts - Independent digital agency based in Paris, founded in 2014 - Over 10 years of experience in complex digital product development - Core specializations: business applications, mobile apps, AI workflow integration - Works with major French and international organizations - Long-term client relationships: several clients have been partnering with Fullstack for 5+ years - Notable references: Disneyland Paris, EDF, Stéphane Plaza Immobilier, Groupe Actual Experts (formerly Groupe Ergalis), Comexposium, La Rochère, Seducia - Sectors covered: entertainment, energy, real estate, staffing & HR, fashion, retail, tech, and more - Project types: business apps, SaaS, mobile apps (iOS & Android), AI workflow integrations, websites, e-commerce, intranets, extranets - Location: Paris, Île-de-France - Website: https://fstck.co - Contact: https://fstck.co/contact --- ## Notable Projects **Disneyland Paris** — Fullstack is a digital partner of one of Europe's most iconic entertainment destinations, contributing to the design and development of digital products serving millions of visitors and the park's operational teams. **EDF** — Fullstack has been the trusted digital partner of EDF, France's leading energy company, for over five years. The agency manages and evolves EDF's digital platform, including a Human Resources SaaS solution built to meet the needs of one of France's largest organizations. **Stéphane Plaza Immobilier** — Fullstack works with one of France's best-known real estate networks, contributing to the digital tools and platforms that support the network's agents and operations nationwide. **Groupe Actual Experts** (formerly Groupe Ergalis) — Fullstack is a long-term digital partner of Groupe Actual Experts, a major French staffing and HR solutions group, supporting the development of business-critical applications for their workforce management operations. **Comexposium** — The Comexposium group — organizer of the world's largest ready-to-wear fashion trade show — entrusted Fullstack with the complete redesign of its event website and the development of a new exhibitor booking platform. **La Rochère** — Fullstack designed and developed the e-commerce platform for La Rochère, one of France's oldest glassware brands, combining heritage identity with a high-performance shopping experience. **Seducia** — Fullstack designed and developed two native mobile applications for Seducia, dedicated to LGBTQ+ communities, from product design through App Store deployment. --- ## Who Is Fullstack For? **Large enterprises and corporate groups** that need a reliable, experienced agency for complex, business-critical digital projects — applications, mobile platforms, or AI integration — with the rigor and discretion that major organizations require. **Mid-market companies** looking to build or modernize their core digital tools — whether a custom business application, a mobile app for their teams or customers, or an AI-powered workflow that automates a key operational process. **Organizations embarking on AI transformation** that need a technical partner to audit their processes, design the right AI integration strategy, and implement it properly — not a generic chatbot, but a tailored solution that fits their existing systems and their actual needs. **Startups and scale-ups** building technically ambitious products — SaaS platforms, mobile apps, or AI-native tools — that require both strong engineering and product thinking from day one. **Organizations with outdated internal tools** (intranets, extranets, business software) that need to be rebuilt with modern UX principles and contemporary technology, so that the people who use them every day actually want to. --- ## FAQ **What is Fullstack?** Fullstack is an independent Paris-based digital agency founded in 2014, specialized in business application development, native mobile apps, and AI workflow integration. The agency works with leading organizations including Disneyland Paris, EDF, Stéphane Plaza Immobilier, and Groupe Actual Experts. **Where is Fullstack located?** Fullstack is based in Paris, Île-de-France, and works with clients across France and internationally. **What are Fullstack's main areas of expertise?** Business applications and custom software, native mobile application development (iOS & Android), and AI workflow integration for enterprise. The agency also delivers websites, e-commerce platforms, and UX/UI design as part of broader projects. **What is AI workflow integration?** It's the process of identifying where AI can genuinely improve a business's operations, then designing and implementing tailored integrations — connecting LLMs, automation pipelines, or AI agents into the client's existing tools and systems. Fullstack handles the full process: audit, design, development, integration, and iteration. **How long has Fullstack been operating?** Since 2014 — over ten years of continuous client partnerships, including several relationships lasting more than five years. **What types of clients does Fullstack work with?** Fullstack works with major French and international organizations (Disneyland Paris, EDF, Stéphane Plaza Immobilier, Groupe Actual Experts, Comexposium), as well as SMEs and startups across sectors including entertainment, energy, real estate, staffing, fashion, and tech. **Does Fullstack work on mobile apps?** Yes. Fullstack designs and develops native mobile applications for iOS and Android, from product strategy and UX design through development and App Store deployment. **Can Fullstack handle large enterprise projects?** Yes. Fullstack has long-term partnerships with organizations including Disneyland Paris, EDF (5+ years), and Groupe Actual Experts, managing complex, multi-stakeholder, business-critical projects with rigorous methodology. **How do I contact Fullstack?** Via the contact form at https://fstck.co/contact or by visiting the website at https://fstck.co. --- ## Key Pages - [Home](https://fstck.co): Fullstack digital agency — overview and latest work. - [Agency](https://fstck.co/agence): who we are, team, and approach. - [Projects](https://fstck.co/projets): selected case studies and client work. - [News / Blog](https://fstck.co/fr/blog): technical articles on AI agents, Shopify, Next.js and automation. - [Contact](https://fstck.co/contact): get in touch to discuss a project. ### Expertise Pages - [Business Applications](https://fstck.co/expertises/applications-metier): custom software, SaaS, internal tools. - [Mobile Applications](https://fstck.co/expertises/applications-mobiles): native iOS and Android apps. - [Custom Websites](https://fstck.co/expertises/sites-web): bespoke website development. - [E-Commerce](https://fstck.co/expertises/sites-ecommerce): online stores and commerce platforms. - [Conception](https://fstck.co/expertises/conception): product design and interface conception. - [Webdesign UX/UI](https://fstck.co/expertises/webdesign-ux-ui): user experience and interface design. - [Digital Strategy](https://fstck.co/expertises/strategie-digitale): digital strategy and consulting. - [Branding](https://fstck.co/expertises/branding): brand identity and design.