Product Design Agencies in Lille

At the crossroads of a consulting firm, an agency, and an IT services company, NEXTON cultivates an innovative positioning. Thanks to our experts, we support our major clients and pure players in their digital evolution and innovation strategies.

Our service offering:

DIGITAL

Create, improve, and bring your product or service to life

COMMUNICATION & MARKETING

Create, animate, and make your brand perform

STRATEGY

Support, structure, and evolve your organization

A committed company, NEXTON is certified ISO 9001, 27001, Ecovadis Gold top5% (78/100), Gender equality index 92/100.

We support our clients on topics of custom web and mobile design & development.

Since 2010, we have been involved in creating websites, platforms, and mobile applications.

We work for start-ups and associations: Action contre la faim, Fondapol,

for large groups: Roche, Rungis, Nespresso, Freyssinet, Galbani, Best Westen etc.

as well as (very) innovative clients: Mirakl, SkinAnalysia etc.

We are involved in the Consulting phase: Usage & needs definition, Infrastructure & technologies, Digital transition consulting, but also in the execution phase: UX & UI, Web development, Mobile development,

as well as consulting in Server Infrastructure.

We favor close support for clients with dedicated project managers, using agile methods.

Our team is composed of specialized technical profiles, to approach our projects in an optimized way and be reactive to our clients' requests. Our quality testing and automated deployment methods allow us to maintain this same reactivity in the very long term.

Contact us for a free analysis of your project.

LE BACKYARD est une agence d’innovation digitale qui intervient à un niveau stratégique pour créer et optimiser des outils digitaux performants à travers une conception centrée utilisateur. Notre agence est située à Paris 11ème, et notre équipe est composée de 30+ experts (UX et UI designers, Product Owners, Developers web et mobile,.)

Notre maîtrise de l’ensemble de la chaîne de valeur d’un projet digital, nous permet de vous accompagner dans l’activation de leviers vous permettant de gagner en productivité, d'augmenter vos parts de marché, d’améliorer votre image de marque et/ou de fidéliser vos clients.

Notre méthodologie est centrée utilisateur et nos interventions toujours tournées vers des résultats mesurables dans le but de vous concevoir des outils toujours plus performants et rentables. 

Nous sommes agrées CII pour vos projets mobile et web et donc vous pouvez bénéficier d'un crédit d'impôt de 30% sur l'ensemble de nos prestations (soumises à conditions)

NOS DOMAINES D'EXPERTISE :

>>> USER EXPERIENCE >>>

UX research / UX design / UX writing

>>> USER INTERFACE >>>

UI design / Design d'interaction / Service blueprint / UI kit / Design system

>>> PROJECT MANAGEMENT  >>>

Positionnement produit / Définition solution / Contrôle qualité / Pilotage projet

>>> DEVELOPPEMENT WEB   >>>

 Sites vitrines / Plateformes e-commerce / Marketplace / Outils métiers / Intranets / Extranets / Maintenance

>>> DEVELOPPEMENT APP MOBILE >>>

Natif / 

Notre équipe de développeurs travaille exclusivement sur  la technologie React Native.

NOS CLIENTS  :

CITYSCOOT, COINHOUSE, SAINT LAURENT, EDF, GROUPE ADP, METROSCOPE, ORANGE, AMAZON, VINCI IMMOBILIER, MONEY TRACK, VEOLIA, RAIL EUROPE (SNCF), BLABLACAR, LOXAM, O'TACOS, THEOP, ENEDIS, SOWEE... 

Nous travaillons aussi bien avec des grands groupes leaders qu'avec des Startups prometteuses. des PME et des TPE. Nous avons accompagné ces cinq dernières années près de 100 clients évoluant dans secteurs d'activités variés. 

Découvrez toutes nos expertises et réalisations sur www.lebackyard.fr.

With a team boasting over 20 years of experience,KREAPP stands out in the creation of tailor-made business applications. We have evolved, progressing from designing applications for large corporations to developing custom solutions for SMEs. Our journey is marked by ongoing success, demonstrated by our expertise in end-to-end application development, from the initial idea to concrete implementation.

Our team is the heart of our strength. Composed of a Product Owner, a designer, a UX specialist, Fullstack developers, and a manager—all experts and seniors in their field—we have the skills needed to turn your ideas into tangible realities. We support decision-makers and entrepreneurs at every stage, from ideation to resolving specific business challenges.

We understand that each project is unique. Our approach consists of providing fully tailored solutions to your specific needs. Whether it's digitizing your processes, developing business plans, defining requirements, conducting market studies, or implementing software solutions, KreApp stands by your side.

As your innovation partner, KreApp goes beyond simple application development. We provide strategic support in marketing, research and development, expertise in software architectures, and much more. Whether you're looking to develop a custom application or personalize existing software, our goal is to propel your business to the forefront of technology.

Our human-scale structure, combined with our professionals' expertise, gives us remarkable agility. We are able to react quickly and efficiently, ensuring the implementation of customized software solutions that perfectly meet your expectations.

KREAPP is ready to turn your vision into digital success. Contact us to begin a partnership that will redefine the potential of your business.

W3r.one supports companies in the design and development of fully custom web and mobile applications. We build robust, intuitive, and scalable solutions, perfectly aligned with your needs, processes, and ambitions.

We get involved from the very first steps to structure requirements, lay solid technical foundations, and make the right choices from the outset. Thanks to our consulting approach, we help you connect your business challenges with the most relevant technologies and find solutions throughout the project, even as needs evolve.

We work with SMEs, mid-sized companies, and venture-backed startups looking to establish a solid technical stack to support their growth, reassure their investors, and scale without technical debt.

🎯 Our Approach

➤ Scoping workshops to align product vision and ground reality

➤ Highly user-centric UX/UI: clear, simple, effective

➤ Custom full-stack development (React, React Native, TypeScript, Symfony...)

➤ MVPs delivered in a few weeks, without compromising on quality

➤ Seamless integration of all your tools via API (ERP, CRM, third-party services...)

➤ AI & Data Expertise: automation, analytics, decision support

➤ Optimization of internal processes through custom business platforms

➤ Continuous technological consulting: architecture choices, scalability, technical trade-offs

💡 Our Difference

We translate your business challenges into concrete, high-performing digital solutions that are ready to evolve with you.

At W3r.one, every line of code serves a clear vision: to build a solid, scalable, and useful technical foundation.

Do you have an idea, a project, or a business need to transform?

📩 Contact us, let's talk about it.

At Keleo Solutions, we transform complex ideas into simple, useful, and sustainable digital solutions.

Web & mobile applications, custom business software, UX/UI… since 2016, we have been designing digital tools that address real business challenges, with a strong focus on user experience, performance, and environmental impact:

• Custom business software
• Web & mobile applications
• AI Automations
• Various AI Tools

🎯 Our difference?

• A cohesive multidisciplinary team that speaks both tech and user language.

• End-to-end strategic support: from ideation to deployment.

• An ethical, responsible, and committed approach to digital technology.

Our clients? VSEs, SMEs, mid-sized companies, local authorities, and ambitious startups that want to:

✅ Design a custom application (web/mobile)

✅ Optimize an existing product or user journey

✅ Create value through clear UX and agile development

✅ Rely on a reliable, human-sized, and involved partner

At Keleo, we don't just code to deliver. We design to make an impact.

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

At Lost Mechanics, we create custom websites, placing your needs and expectations at the heart of our process. Our team of web designers and developers combines creativity and technical expertise to design engaging user experiences, offering perfectly tailored and sustainable solutions.

We firmly believe that unconventional thinking is essential to stand out in a constantly evolving digital environment. This approach is an integral part of our DNA and guides us in each of our projects.

In close collaboration with you, we define strategies that reflect your vision and respect your identity. Our expertise in user experience allows us to design projects that meet modern web usage, ensuring smooth and intuitive navigation for your users. We ensure total transparency throughout the creation process; everything we do is done in-house, guaranteeing rigorous monitoring and tailor-made results.

Our services:

Design . Development

• Web and application development
• UX Design & Research
• Interface Design
• Illustration & Animations

We are convinced that unconventional thinking is essential to stand out in a constantly evolving digital environment. This approach is an integral part of our DNA and guides us in each of our projects.

Together, let's create digital solutions for the future.

A digital production studio committed to meet tomorrow's challenges by building eco-designed solutions, with the latest technological innovations.

We make digital solutions that are more efficient, more secure and less resource-intensive.

L’expérience utilisateur au service de votre croissance

Que vous souhaitiez lancer ou refondre un site vitrine, un site e-commerce, une application mobile ou une solution métier sur-mesure, notre agence digitale - basée à Strasbourg, Aix-Marseille, Lyon et Paris - vous accompagne avec une approche méthodique et éprouvée, garantissant des résultats mesurables pour votre activité.

Couvrant tout le cycle de vie de votre projet de conception digitale, de la stratégie business à la réalisation technique, en passant par la recherche utilisateur, l’UX/UI design et l’amélioration continue des performances, nous créons ensemble des expériences impactantes et engageantes, qui font la différence depuis +15 ans.

Comme l’étoile du berger, les utilisateurs finaux et vos enjeux commerciaux nous guident dans chacune de nos missions.

Curieux d’en savoir plus ?

Challengez-nous !

03 67 10 08 49

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Nos expertises :

• Audit et analyse : https://adeliom.com/expertises/conseil-etude-ux/

• Conseil, cadrage et stratégie : https://adeliom.com/expertises/cadrage-strategique-amoa/

• Recherche utilisateur : https://adeliom.com/expertises/recherche-utilisateur/

• UX/UI Design : https://adeliom.com/expertises/ux-design-conception/

• UX Writing : https://adeliom.com/expertises/ux-writing/

• Développement web et app : https://adeliom.com/expertises/developpement-web-app-mobile/

• Web analyse et conversion (CRO) : https://adeliom.com/expertises/web-analyse-conversion-cro/

• Coaching et formation : https://adeliom.com/expertises/formation-coaching/

We are SaaS solution publishers, and each product we develop is the result of years of experience and process optimization, particularly with our development studio. Our teams master all the steps necessary to design, develop, and launch high-performance SaaS solutions, always with a focus on continuous innovation.

FLEXILAB, created in 2015, represents the culmination of over two decades of experience in the technological field, marked by leadership focused on functional product design, software architecture, and efficient project management.

This company stands out for its commitment to functional customer support. Focused on services and software publishing, FLEXILAB offers cutting-edge expertise in application design and IT project management.

Digital Unicorn is a digital studio specializing in the design, design, and development of high-performing, innovative, and tailor-made digital projects. We are a team of developers, designers, and project managers, all experts, passionate about our work and proud of the mobile applications we create for our clients.

Whether you are a large company or an innovative startup, whatever your project, we are here to carry out the project you need.

Technological Solution

• At the forefront of the latest trends and technological advancements, we conceive and develop the best solutions for each of your needs: connected objects, micro-geolocalization, artificial intelligence, virtual reality... We favor the latest, most robust and efficient technologies such as React Native, Node.js, Redux or Firebase for the development of your projects.

• We like to be fully involved in projects by offering the creation and development of UX (User Experience), then UI (User Interface), and Design to ensure that the technical and commercial product design truly meets the needs of the target audience. We are convinced that close collaboration from the very beginning of an idea is the guarantee of rapid and efficient development, in order to ensure future success. We make it our priority. This first step includes defining the key functionalities of your project and the associated technical specifications.

UX and UI Design Solution

• Our designers work with you to create a graphical interface (UI) and user experience (UX) that are both creative, stylish, and meet the functional constraints of your project. We invite you to read the article we wrote on the definition of UX Design and its difference from UI Design.

• The design and development phases are very important. In order to stand out, design and user experience will allow us to offer a real VP (Value Proposition) for your project. This will determine the first impressions of your users, knowing that more than 80% of users uninstall the application after 1 minute of use: it is therefore essential to prioritize this part.

Blacksmith (www.blacksmith.studio) supports large accounts, SMEs, and startups as a CII-certified web agency and startup studio since 2016.

We are experts in digital projects: redesign or creation of showcase websites, logos, visual identity, web and mobile applications, dashboards, SaaS, institutional websites, e-commerce...

We handle design (UX/UI, Product Design) and develop tailor-made solutions for you within a scalable and secure cloud architecture.

Our expertise:

1) Design: UX/UI, audits, branding, advertising banners, emailing, print...

2) Web and Mobile Development: showcase websites, apps, SaaS, dashboards, e-commerce... as well as no-code/low-code websites.

Stack: AWS, Jamstack, Strapi, Vercel, React.js, Nest.js, Next.js, Shopify, Wordpress...

3) Project Management: agile or fixed-price project management

4) Cloud & DevOps: audits, implementation, CI/CD, IAC, stress tests...

5) Content Creation: social media posts, newsletters, photo shoots...

6) Web3: NFT minting on Ethereum, Solana, etc.

Some of our latest achievements:

- https://riotgamesfrance.fr/ (design + web development + cloud architecture)

- https://parisbusinessangels.com/ (design + web development + cloud architecture)

- https://www.riot.eurcommunitycompetition.com/fr (design + web development + cloud architecture)

- https://www.fhu-apollo.fr/ (design + web development + cloud architecture)

- https://skillwise.fr/ (design + web development + cloud architecture)

- https://www.cavaclasher.fr/ (design + web development + cloud architecture)

- https://justrent.fr/ (design + web development + cloud architecture)

We have also designed and developed hundreds of advertisements for major brands (GIFI, TATI, Intersport, Jardiland, H&M, etc.).

Blacksmith is also:

1️⃣ Partner Shopify, AWS, Vercel, Strapi, BigCommerce, and Klaviyo.

2️⃣ Recognized by Sortlist with 1 European Award for “best customer satisfaction” and 2 features in their Guide to the Best Agencies

3️⃣ CII Certified: you can recover 30% of the amount of our Innovation invoices as tax credits

The technical challenge is high? No worries, we have successfully created several complex custom products:

- integrating third-party banking services such as Treezor

- integrating complex private APIs with https://lepass.io/ which allows refueling using DSRC badges at ENI gas stations

- integrated into secure cloud architectures, allowing us to handle tens of thousands of simultaneous users while maintaining reasonable financial costs

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"I don't know who you are. I don't know what you want. [...] What I do have are a very particular set of skills, skills I have acquired over a very long career. Skills that make me a nightmare for your bugs. [...] If you let me loose on your code, it will end here. I will find them, I will hunt them down and I will kill them."

Jacky - Lead Dev @ Blacksmith

www.blacksmith.studio

OUR MISSION

We support entrepreneurs and tech decision-makers in innovating and succeeding with their product(s) by having a strong impact on their end-users. We are involved in the entire product development lifecycle: design, development, deployment, and application maintenance and evolution.

Our approach is based on 3 pillars:

1/ Understanding your business and operational challenges

Each collaboration is based on the need to solve business problems and create value for your business. This impact-driven approach is at the core of our value proposition.

2/ Designing intuitive and elegant applications

We place great importance on UX and UI to reconcile design and efficiency.

3/ Developing on solid foundations

The code produced must be maintainable & tested, and use the latest versions of the most performant open-source technologies.

OUR EXPERTISE

Developing new products is our core business. We are involved in 3 types of missions:

1. Identifying growth opportunities

Our teams work alongside you to identify projects that will enable you to achieve your growth milestones, and realize them with you to secure your return on investment.

2. Designing & developing the right products

Our teams work for the success of your projects, either by taking charge of your product's realization from design to deployment, or by supporting your teams to bring the expertise that will improve the efficiency of your production.

3. Supporting your organization's growth

Our experts work with your product and tech teams to enable your organization and IT system to grow effectively (methodology, HR organization, support in finding missing talents, training, audits, and identification of scalability levers).

With over 15 years of experience in cloud integration and as a partner of Google Cloud and Microsoft, our team is 100% dedicated to predictive AI and generative AI topics.

Our values:

- Proximity: a team composed of PMs, data scientists, and AI developers on each project

- Adaptation: a personalized approach according to your business -> adapting technology to the business and not the other way around.

- Knowledge transfer: supporting teams in using AI responsibly and autonomously (skills transfer).

- Agile Experimentation: We rapidly co-create your future business AI assistants.

How does it work?

- Acculturation: train and identify priority use cases => business interview + scoring matrix.

- Experimentation: with technical teams to deploy a first use case.

- Production: Teams apply the acquired skills with our support for the deployment of other assistants.

Client benefits:

Phase 1 - Acculturation & Use Cases:

- Build relationships with business units, detect use cases operationally.

- Share the use case identification method with IT teams, our matrix for prioritization.

- Identify solutions, size each project according to ROI (real / incremental), and build project approaches.

Phase 2 - Experimentation:

- Address a project use case with the IT team in a skills transfer mode.

- Create the architecture foundation (with an AI assistant to start) to ultimately enable IT adoption and replication for other use cases.

- Start practical training for IT teams: learn to manage, address, and deliver an AI use case by practicing.

- Be concrete and repeat the method for future use cases.

Phase 3 - Build & Run:

- The company can internalize new skills and create a generative AI innovation hub without going through new quotes or outsourcing.

- Our support and reinforcement can be activated upon request.

Our clients supported in the development and monitoring of their generative AI strategies:

Cartier, L'Oréal, G7, Etam, Orange, Vinci, Cogedis, Groupe Herez, Olympic Committee 2024, Holcim, iExec, Blachere Illumination,

Thiga is a consulting and training firm specializing in Product. Product Management, Product Design, Product Marketing: we master these disciplines at the heart of Tech companies. And we help you with your 4 biggest challenges: strategy, organization, operational support, and training.

🧠 Strategy: take the right directions for your product and your new features

🚀 Organization: transition from a traditional organization to a Product-oriented organization

🤝 Operational: from junior to Chief Product Officer, strengthen your team with a Thigirl or a Thiguy

💡 Training: throughout your career, strengthen your skills and those of your teams. More than 1500 people are trained by Thiga every year!