This project was part of a digital product design training program focused on user experience strategy, research, and feature innovation. The challenge was to rethink the existing Leboncoin website, identifying usability issues and proposing a new feature that could improve user engagement and platform visibility. Our team aimed to combine research-based insights with modern interface design principles, resulting in a clear, cohesive, and engaging digital experience.
timeline
TEAM
Le Boncoin is one of France’s most visited online marketplaces, but years of incremental updates resulted in a fragmented visual language and inconsistent user experience.
The challenge was twofold:
Harmonize the website’s existing experience by identifying UX/UI inconsistencies.
Explore new, high-engagement opportunities, including a feature that could expand the platform’s audience and create additional business value.
FIELD INTERVIEW
During user interviews — particularly with younger demographics — we presented the idea of adding an “Auction Sales” feature to the platform. The feedback was overwhelmingly positive: many participants indicated that they currently resort to platforms such as eBay for auction-style shopping and welcomed the opportunity for Le Boncoin to offer a similar experience.
The insights gathered during the interviews allowed us to build a reliable persona and validated that our feature direction aligns with real user needs. This confirmation strengthened our confidence in the decision and ensured that the concept is grounded in authentic user expectations.
UX AUDIT AND SYSTEM UNDERSTANDING
To gain a clear understanding of the current ecosystem, we conducted a full UX/UI audit focusing on:
Navigation and information structure
Layout inconsistencies
Interaction patterns
Visual hierarchy
Desktop behaviours
PROBLEM STATEMENT
The current Le Boncoin website suffers from inconsistent layout, visual clutter, and fragmented interaction patterns. As a result, users experience confusion, reduced trust, and friction — particularly when browsing diverse categories. Meanwhile, younger audiences expect more dynamic, engaging features that reflect modern digital marketplaces.
PROJECTS GOAL
Improve clarity, readability, and visual consistency
Reinforce trust through more predictable patterns
Modernize the interface to better reflect brand and user expectations
Explore new ways to attract younger demographics
Identify potential business opportunities aligned with emerging user behaviours
To expand Le Boncoin’s reach and engagement, we explored the introduction of a “Ventes aux enchères” (Auction Sales) feature.
WHY AUCTION?
Younger users are drawn to dynamic, real-time interactions
Auctions create natural excitement and replay value
Opportunity to boost traffic and session duration
New business model with high engagement potential
Strengthens Le Boncoin’s position in the second-hand market
CONCEPT EXPLORATION INCLUDES:
Auction landing page
Auction listing card
Countdown and bidding interactions
Seller-side entry point for creating auction listings
Notifications
Based on the audit insights, we developed several design directions to modernize the platform while preserving its core identity:
Harmonized spacing and improved page rhythm
Simplified card layouts to enhance scannability
Stronger visual hierarchy on listing pages
More consistent components and states across the system
Better alignment between desktop and mobile experiences
The redesign was carried out collaboratively with a team of two full-stack developers.
My role focused on:
Building and styling the footer and navigation bar in HTML and CSS
Ensuring visual consistency and responsiveness across devices
Communicating closely with the developers to align the design with technical requirements
This phase highlighted the importance of cross-disciplinary dialogue and iteration between design and development.
EXPECTED IMPACT
A more modern, cohesive, and user-friendly website
Higher readability and consistency across pages
Increased user trust through predictable visual patterns
A new high-engagement feature (auctions) that creates business value
Potential to attract younger users and refresh Le Boncoin’s audience profile
LONG-TERM OPPORTUNITIES
Expand auctions into thematic or seasonal events
Introduce social engagement features (followers, notifications, watchlists)
Integrate gamification elements for bidding history or achievements
This project reinforced the importance of working closely with cross-functional teams and considering both user needs and business strategy when exploring new features.
