Design UX / UI

The importance of user experience (UX) and user interface (UI) design has never been more crucial to our daily interactions. Users expect smooth, intuitive and enjoyable digital experiences, whether on websites, mobile applications or software platforms.

At Ylly, we build our support around strategic, functional, ergonomic and graphic design, with you, around four pillars: the UX approach, your history and DNA, eco-design and anticipating technical issues.

Whether you want to improve an existing application, design a new website or develop an innovative mobile application, our UX UI experts are the guarantors of your digital transformation, at the heart of a project team dedicated to your needs. Your issues become our issues.

Let's work together to assess your project needs and build an appropriate digital strategy.

Discover our B2B and B2B2C expertise

Discover the expertise of our agency, with numerous references in the B2B and B2B2C fields. We are recognized for our collaborative approach, based on a UXUI methodology, which enables us to co-design projects with our customers to best meet their needs and objectives.

Whether creating corporate websites, developing business applications, designing mobile apps, setting up e-commerce sites or creating product configurators, we work on all types of digital projects to deliver exceptional user experiences and tailor-made solutions.

We invite you to explore the world of projects we've successfully completed. Each case study is a story of collaboration, innovation and measurable results, illustrating our personalized approach and expertise in digital design. Discover how we have accompanied our customers in their digital transformation, creating unique and engaging user experiences. Be inspired and imagine what we could achieve together for your project.

See our business cases

User Experience at the core of our approach

We are constantly on the lookout for the latest interface innovations and best practices in ergonomics and usability. We strive to make interfaces accessible and user-friendly for all users, taking into account their characteristics and limitations.
In addition to understanding users from the outset, we also conduct in-depth tests with users and gather their feedback. This enables us to accurately assess the usability and accessibility of the interface, to ensure an optimal user experience.
Creating a successful user experience means anticipating every potential user interaction and meeting their expectations at every stage of their journey. We are committed to designing interfaces that captivate, engage and convert users, using a user-centered approach at every stage of the design process.

3 key points of our UX/UI methodology

A user-centered (UX) design approach

We take a user-centered approach here, focusing on your personas (your customers and prospects, for example). Our aim is to understand the needs of your target audience and meet their expectations in terms of using the platform.

Your brand history and DNA

The foundations of a brand are its history and DNA, determining its identity and personality, and consolidating its place in the market. The new site or platform must faithfully reflect the brand's values, offering a warm experience where visitors feel trusted and close to you.

Anticipating technological challenges

Technology is the very essence of any digital project. It is essential to integrate and anticipate the technological dimension right from the design phase. This enables us to anticipate potential obstacles, reduce risks and, above all, ensure that our customers' deadlines and costs are kept under control.

Observation

Gathering of project requirements

Research on target users

Understanding Pain Points and Gains

Ergonomic audit

Benchmark or competitive analysis

Co-construction of personas and empathy cards

Creation

Build personas and empathy maps

Creation of user stories and workflows

Definition of information architecture

Navigation validation

Conception and tests

Creation of zonings, wireframes and functional models

GUI design

Creation of the design system

Interaction design

Solution development

Usability testing

The benefits of investing in a solid UX/UI design methodology

Optimizing development time
/ A well thought-out UX/UI design anticipates constraints and avoids delays and costly corrections during development, speeding up the development process and reducing costs.
Increased conversion rates
/ Well-designed interfaces facilitate the purchase or conversion process, resulting in increased conversion rates and revenues.
Improved customer satisfaction
/ User-friendly, intuitive interfaces ensure a positive user experience, increasing customer satisfaction and loyalty.
Reduced customer support costs
/ Effective UX/UI design reduces user error and the need for customer support, saving resources.
Search engine optimization
/ Search engines favor websites with a good user experience, which can improve SEO rankings and increase online visibility.
Enhanced brand reputation
/ Aesthetically pleasing, user-friendly interfaces reinforce users' perception of the brand, helping to improve its reputation and credibility.
Maximized return on investment (ROI)
/ By improving the user experience and optimizing conversion processes, a solid UX/UI design generates a measurable and sustainable return on investment for the company.

Our clients testify

« The Ylly team was able to read my mind and realize the platform I imagined, showing creativity and agility. »

Michaël Tartar

Founder - DIMM.UP

Our clients testify

« The support and expertise of Ylly's teams have been a major asset in the implementation and success of our health care platform. »

Kévin Lam

Digital project manager - Takeda France

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