Freelancer profile translated to English.
Back to original languageAbout Mathieu
Product Designer in B2B SaaS, I approach design with a business-oriented vision. 15 years in digital marketing, 6 in product design: this dual background guides my way of conceiving.
My playgrounds: AdTech, HR selfcare, financial simulators, booking platforms. Products where the goal is not to make them look good, but to reduce complexity, drive adoption, and withstand business trade-offs.
AI works with me on two levels. In my workflow first: explore faster, structure user research, prototype more options, make better decisions. In the products next: design AI-assisted features that enhance user autonomy without trapping them in opaque automatisms.
Always curious about ambitious projects that combine business complexity and usage requirements.
French
Native or bilingual
English
Native or bilingual
Spanish
Basic
Can work on-site
Paris (up to 10km)
Experience
- Mathieu DEFARGEProduct DesignerCONSULTING AND AUDITSSeptember 2020 - Today (5 years and 9 months)Paris, FranceB2B SaaS assignments on products with high business complexity: financial and retirement simulators, HR selfcare platforms, AdTech tools, event booking platforms. Varied contexts, from large corporations to scale-ups.What I do concretely:From discovery to deliveryUser research (interviews, task analysis), scoping, high-fidelity prototyping, design system, delivery in collaboration with tech teams. No rigid separation between phases: what matters is that the delivered solution holds up to real usage.Complexity ReductionThe majority of my assignments involve taking over B2B tools that have become unreadable or abandoned by their users. Work on cognitive load, progressive disclosure of information, and prioritization of critical actions.Operational Design SystemsImplementation or redesign of Figma design systems (components, variables, modes) designed to be used by product and tech teams, not just to look good in a presentation.User-Centric AI Feature DesignIntegration of AI-assisted features into products: data verification, assisted generation, decision support. Work on suggestion transparency, user control, and safeguards, so that AI enhances autonomy instead of creating dependence.AI in my daily workflowActive use of tools like Figma Make, Claude, and ChatGPT to explore more avenues in discovery, structure user research, accelerate prototyping, and challenge my own design decisions.Collaboration with Business TeamsRegular alignment with product, tech, management, and sometimes investors. My background in digital marketing helps translate design challenges into business language, and vice versa.
- flowttrFounder & Product DesignerCONSULTING AND AUDITSJune 2025 - Today (1 year)Paris, Franceflowttr is a side-project AI-powered HR assistant designed to simplify access to HR information for employees and free up HR teams from repetitive tasks.**Current Stage**: Figma and Figma Make prototype, validated through user research (interviews, surveys, prototype testing) conducted with about ten HR professionals. Developed alone, evenings and weekends.What I explore with it:Designing AI Interfaces from ScratchConversational interactions, suggestion transparency, user control, model error handling.AI-Assisted PrototypingIntensive use of Figma Make and Claude to iterate quickly and test more variations.Solo Product Approach, Grounded in PracticeDiscovery, user research, positioning, user journeys, design system. Constant trade-offs between ambition and execution realism.My exploration lab for AI design applied to B2B SaaS.
- VECTAURY | Mobsuccess GroupHead of Product MarketingCONSULTING AND AUDITSJune 2019 - August 2020 (1 year and 2 months)Paris, FranceVectaury, a French scale-up in mobile and AdTech data (programmatic advertising for advertisers and agencies). Strong growth during the period, internationalization, and new product launches.My role covered a hybrid scope of product strategy / product marketing, in close collaboration with the Product, Design, and Tech teams, on the launch of the self-service marketing performance tracking platform for advertisers and agencies.Specific scope:Product Vision and StrategyDefinition of positioning, contribution to vision and roadmap, in line with business and market challenges. Work on product-market fit with a panel of B2B clients.Discovery, Delivery, Creative ContributionParticipation in design workshops and sprints, contribution to user stories, user flows, and data visualization tools. Active input on structuring creative choices (colors, layout, visual tone) in collaboration with the Design teams.User Research and UX WritingPersonas, user journeys, integration of UX writing to streamline experiences. Benchmarking of competitor tools to refine client analysis.Adoption and Go-to-MarketDefinition of a clear product vision to foster internal and external adoption, up to the MLP (Minimum Lovable Product) phase.This position marked my gradual transition from product marketing to product design, which I continued as a freelancer starting in September 2020.
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Education
- Master's degree, Management, Specialization in B2B (4th year) and E-business (5th year)EMLV - Léonard de Vinci School of Management2010Bac +5, Management, Spécialisation B2B (4e année) et e-business (5e année)
- Bachelor's degree in ManagementLaurea University of Applied Sciences2008Bac +3 Management en Finlande
Certifications
- Use ChatGPT to improve your productivityOpenClassrooms2024
- Product Designer "Bootcamp" TrainingThe Design Crew2024