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* PRODUCT DESIGN SERVICE

Is your software becoming difficult to use, sell or scale?

We help SaaS, B2B interfaces, and enterprise software editors modernize their critical components to improve clarity, adoption, and performance.

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Jessy
Célestin

Strategic Product Design
for B2B SaaS and enterprise software – Lyon & Paris

MERVEILLEUX AT A GLANCE

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Our Clients

B2B software, SaaS, and enterprise software companies looking to modernize their product.

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Our Services

UX Audit, Interface Redesign, Design System, long-term Product Partners.

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Business Impact

Improved clarity, stronger adoption, better ergonomics, and measurable impact on your key product KPIs.

WHEN TO CALL US?

We step in when the user experience hinders software adoption, clarity, or scalability.

  • →Your enterprise software is becoming difficult to use
  • →Your B2B SaaS has an aging interface
  • →You suspect your onboarding slows down user adoption
  • →A core module no longer reflects your product's value
  • →Your product and tech teams lack a clear Design System
  • →Product growth has introduced friction and complexity
Let's discuss your software

OUR APPROACH

A clear, impact-driven methodology.

01
Understand

Workshops, analysis, UX audit, and user research to pinpoint the actual problems.

02
Design

Ideation, wireframes, interactive prototypes, and user testing.

03
Deliver

Developer-ready UI, Design System, and team support.

04
Measure

Tracking key KPIs to refine and sustain long-term impact.

4.9/5 star
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OUR SERVICES

Services tailored for every stage of your product

UX Product Diagnostics, UI/UX Redesigns, and continuous product support for B2B software, SaaS, and enterprise interfaces.

UX Audit

UX Audit

Understand and prioritize

Identify friction points in your interface to boost engagement, conversion, and customer satisfaction.

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Interface Redesign

Interface Redesign

Transform

Improve a key module or a critical user flow without starting from scratch.

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SUBSCRIPTION
Product Partners

Product Partners

Support

Scale your product sustainably with regular design support and the structured creation of your Design System.

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WHICH SERVICE TO CHOOSE?

Different ways to support you depending on your context, maturity level, and budget.

BENCHMARK UX AUDIT INTERFACE
REDESIGN 		PRODUCT
PARTNERS
psychology Need Understand what blocks usage Redesign a critical module or user flow Evolve the product over time
inventory_2 Deliverables Diagnostics, priorities, recommendations Targeted redesign, mockups, prototype Accompanying support, scoping, continuous design
payments Estimated Budget €4.5k - €9k €5k - €15k Starting at €1,900/month
explore Point of Entry Quick Audit starting at €990 Discovery & scoping call Introductory call
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WHY CHOOSE US?

1

We talk business, not just pixels.

Every mockup and user journey is designed to improve your key KPIs (retention, conversion, activation) and generate a measurable ROI.

2

We will never deliver a simple JPEG.

We know what you are thinking: "Yet another group of creatives who will deliver a visual masterpiece that is impossible to develop." No. We think in terms of APIs, performance, and technical constraints.

3

More than designers — we are partners.

With us, the strategists who advise you are the same ones who design your interfaces. You have direct and constant access to our dual expertise, without any middleman.

Learn more about merveilleUX arrow_forward Let's discuss your projects

Client Testimonial

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“They have always been proactive and played a significant role in our decision-making. I warmly recommend taking advantage of their professional and efficient services.”

Ahmed Kanté,CEO at Katech
4.8 / 5info
Survey conducted by us after the service delivery
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Understanding of needs
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Creativity & innovation
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Your questions, our answers

Everything you need to know before launching your UX transformation with us.

What is a B2B SaaS UX audit?
Based on Nielsen's 10 usability heuristics, a UX audit helps identify what hinders your product's usage: confusing navigation, cluttered screens, unnecessary steps, or misunderstood features. The goal is not just to list flaws, but to help you see what needs to be corrected first to improve clarity, adoption, and conversion.

Our UX audits start at €990 for a 3-day Quick Audit. See all our pricing for more details.
When should you modernize enterprise software?
When the interface becomes difficult to use, explain, or scale. Usually, the signs are clear: heavy workflows, aging interface, support teams flooded with repetitive queries, or a feeling that the product no longer reflects its value. Modernizing allows you to overhaul critical parts without starting from scratch.
What is a Design System used for in a product team?
A design system provides a shared framework for product, design, and development teams. It keeps the interface consistent, avoids recreating the same components repeatedly, and allows the product to scale cleanly. It becomes essential as soon as a product grows denser, more complex, or harder to maintain.

To give you an example of a complex Design System and its utility: Government of Canada Design System.
Is accessibility part of your approach?
Yes. We integrate the fundamentals of accessibility (WCAG) into our audits and redesigns: readability, contrast, hierarchy, interactive states, and user flow clarity. The goal is to make the product more understandable, reliable, and easier to use. Beyond user comfort, this is also crucial for companies subject to European digital accessibility regulations.

To go further, you can consult the W3C standards and recommendations: WAI Standards & Guidelines.
How do you redesign a module without starting from scratch?
By starting from what already exists. We first identify what is really causing issues: comprehension, navigation, hierarchy, key actions, or overall logic. Then, we target and rework that specific module instead of rebuilding everything. This is often the best way to modernize a product without launching an overwhelming project.
How do you improve B2B software adoption?
You must first understand where the friction lies: a lengthy onboarding, unclear value proposition, complex paths, hidden features, or a confusing UI. Once identified, you can simplify flows, clarify the interface, and make the product easier to grasp. Adoption rarely increases due to a single feature; it improves when the product becomes simple to understand and useful from the very first interaction.

Ready to take
your product
to the next level?

Let's discuss your ambitions and see how we can accelerate your growth together.
First call is on us, completely free and with no obligation.

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