Freelancer profile translated to English.
Back to original languageAbout Sébastien
👨🎨About me
UX/UI designer specialized in data-drivenSaaS applicationsin Fintech. I support SMEs, startups, and large fintech companies in designing data-rich, intuitive, and high-performing interfaces. With nearly10 years of experience**, I am dedicated to translating **business objectivesinto clear and engaging user experiences.
🔧My key skills
👉 UX Research (interviews, surveys, analyses)
👉 Needs analysis & identification of underlying UX issues
👉 Design of user flows, wireframes & UI (high-fidelity mockups)
👉 Rapid and iterative prototyping in Figma
👉 User testing
⚙️My Approach
Every SaaS application design project begins withUX workshops(scoping, empathy mapping, co-creation) to alignbusiness needswith **user problems**.
I iterate through prototypes tested in real-world conditions, analyze feedback, and **refine solutions**.
Exhaustive documentationand anagile workflowensuresmooth and surprise-free deployment.
📄Some references
👉Meta
Role: UX Researcher & UX Designer
Project: user research and UX redesign of an internal SaaS application |+76% users in 1 year
👉Kaiko
Role: UX/UI designer
Description: Web application for the presentation and analysis of a suite of crypto indices
👉BNP Paribas
Role: UX/UI designer
Project: Design of SaaS applications used by the ALMT department to increase user efficiency and avoid manual and repetitive tasks
👉DBX
Role: UX/UI designer
Project: Desktop application to enable traders to better manage their portfolios
📢Languages
French: Native speaker
English: Full proficiency
Spanish: Full proficiency
💬 Available for your fintech SaaS project: let's talk!
French
Native or bilingual
English
Native or bilingual
Spanish
Native or bilingual
Can work on-site
Paris (up to 50km), Lyon (up to 10km), Toulouse (up to 10km), Nice (up to 10km), Marseille (up to 10km)
Experience
- SCH DesignUX/UI DesignerTECHDecember 2021 - Today (4 years and 6 months)Paris, FranceAs a freelance UX/UI Designer, I support SMEs, startups, and large fintech companies (and more broadly any data-rich SaaS project) from the scoping phase to deployment.What I bring to my fintech clients:UX Workshops & Scoping👉 Empathy mapping, interviews & surveys to understand real needs👉 Benchmarking & competitive analysis to position the applicationExperience & Interface Design👉 Data-centric flows, wireframes, and mockups (dashboards, visualizations)👉 Polished, responsive, and accessible UI Design (WCAG)Prototyping & Validation👉 Interactive prototypes in Figma tested in real-world conditions👉 User Testing and A/B Testing to refine UX choicesDeliverables & Methodology👉 Exhaustive documentation (specifications, design system)👉 Agile workflow and rapid iterations to reduce time-to-marketFintech Industry Knowledge👉 Ability to communicate and understand fintech professionals (traders, pricers, portfolio managers, etc.)👉 Advanced functional understanding of fintech challengesExample Results👉Meta Policy Dashboard (data-driven SaaS): +76% time spent on key featuresStreamlined journey and very positive user feedback on Fintech applications👉 Available to structure and optimize your data-driven SaaS application!
- BNP Paribas CIBUX Designer (Consultant)October 2018 - December 2021 (3 years and 2 months)Paris, France- Within the context of digital transformation, redefining the user journey across all data-driven SaaS applications used by the treasury department to increase user efficiency and avoid manual, repetitive, and low-value-added tasks.- Conducting user interviews to understand their data needs and daily usage.- Building personas and user journeys based on real data flows.- Preparing and facilitating user-centered design workshops focused on data visualization and flow.- Designing a new SaaS application that will be the single entry point for all other applications used by the Treasury department. It consists of a dashboard where users can add what we call "widgets" (representing a single feature or specific data from a given application) to build their own view and display the information and actions they want.- Defining a design system to ensure visual consistency across all applications and facilitate developers' work.- Providing specifications to developers and overseeing the development phase.- Conducting user testing and using analytics data to continuously improve designs.- Coaching and training IT teams on Agile and Design Thinking methodologies.
- EPEX SPOTUX Designer (Consultant)July 2016 - August 2018 (2 years and 1 month)Paris, France- Redesign of the trading platform to include major new features.- Conducting user interviews and testing to thoroughly understand the usability issues of the trading platform.- Working closely with the development team.
Reviews
T
Théo
Kaiko
Reviewed on 10/2/2025
We collaborated with Sébastien on the design and UX of our new crypto index platform. The goal was ambitious: to showcase our product offering on an intuitive and modular platform meeting institutional standards.
Sébastien quickly and perfectly understood the product and technical challenges, and proposed solutions that were both innovative and pragmatic, allowing for on-time execution. His work translated a complex vision into clear and effective interfaces. His mastery of design tools (Figma, prototyping, user flows) and his attention to detail ensured a high-level user experience.
I highly recommend Sébastien for any project combining product design, data, and demanding user experience, with impeccable execution and communication.
Raphaël
Ev Software GMBH
Reviewed on 9/22/2025
Sébastien is very professional. He perfectly understood the challenges of our project and proposed perfectly adapted solutions.
We highly recommend him!
Recommendations
MP
+1
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Education
- MicroMaster User Experience Research and Design, UX DesignUniversity of Michigan2018MicroMaster User Experience Research and Design, UX Design
- Master of EngineeringEcole centrale d'Electronique2007Master of Engineering (M.Eng.), Embedded Systems