What if your services became more accessible, clearer and more efficient?
At 5th floor, we believe that digitalization and user experience (UX) are two sides of the same coin.


At 5th floor, we are convinced that digitalization and user experience (UX) are two sides of the same coin.
Together, they enable you to design agile, relevant, and human-centric solutions that are in line with your ever-changing needs.
How do we integrate UX?
Thanks to a team of passionate experts. Our UX researchers help you analyze your uses, understand your expectations and identify your points of friction. Our designers transform this data into innovative solutions through clickable and quickly testable prototypes, in order to validate the choices before implementation.
What we do
“Listen, design, test, improve: the complete UX cycle”
User research (UXR) and functional framing
First of all, we start by listening. Interviews, observations, tests, surveys… Our UX Researchers identify the real needs of your audiences and teams, to ensure that the project is relevant, feasible and useful.
Structuring of pathways and ergonomics (UXD)
Our UX Designers clarify flows, organise information, and trace the most fluid paths.
Trees, wireframes, clickable prototypes: everything is tested and validated before moving on to development.
Testing and continuous improvement
Each interface is tested with target users at different stages of the project.
We iterate quickly to adjust where necessary.
Our approach is based on the responsible and ethical use of artificial intelligence (AI), while respecting privacy, transparency and inclusiveness.

Design of accessible and consistent interfaces
We design screens that comply with accessibility standards (WCAG / RGAA), are consistent with your graphic charter and are easily reusable.
Each project is integrated into a documented design system:
On the Figma side: reusable components, color systems, typography, icons…
On the development side: front-end libraries, tested components.
Our approach
Workshops and co-creation, throughout the project
From the launch, we lead workshops with your business teams, your users and our UX experts in order to:
- understand the issues at stake
- build together a solution that perfectly meets your needs
- avoid unnecessary and costly developments
Workshops are also regularly oxrganized between the UX Research and UX Design teams in order to cross-reference the analyses and bring out the solutions chosen.
The meeting between UXD and UXR
UXR (Research)
focuses on understanding your needs, expectations, obstacles in order to find a clear direction
UXD (Design)
translates this learning into user journeys through, in particular, concrete screens
A coded design system, not just a mock-up!
The design system doesn’t stop at the components in Figma. Our front-end developers work closely with UXR/UXD to translate each component into reusable code for consistency while interacting accessibility standards (buttons, menus, alerts, fields, etc.)
Why 5th floor?
A user experience designed from the start, tested with your audiences, and coded with your developers or ours. Our approach combines research, design and accessibility to create fluid, useful and adopted pathways.
What it changes for you:
Clearer, more efficient services accessible to all
Less friction, fewer errors, more satisfaction
Consistent, maintainable, and scalable interfaces
Tools adopted by your teams and users

FAQ
UX/UI