Sebastien Marteaux — Portfolio
I turn complex ideas into intuitive experiences that drive engagement and conversion.
Senior Product Designer focused on checkout, onboarding, design systems and mobile-first experiences for e-commerce, fintech and B2B SaaS.
About me
About me
Passionate about blending design, strategy, and business thinking, I craft smooth, purposeful digital experiences shaped by motion, clarity, and detail. I help teams transform ideas into refined products that elevate brands, create meaningful interactions, and deliver measurable impact across every touchpoint.
Work
Skills & Services
Continuously evolving with each challenge, I bridge design, development, and brand strategy—aligning vision with execution to craft experiences that are both clear and impactful.
01.
Product Strategy
Helping teams uncover clarity in complex environments — defining the vision, framing the right problems, and aligning design with measurable impact.
I bridge user needs and business goals to build a solid foundation for every product decision.
Through collaborative workshops, research synthesis, and design roadmapping, I help organizations shape products that not only look right, but work right — for both users and stakeholders.
02.
Design Experience
Designing intuitive, high-performing digital experiences that connect purpose, beauty, and usability.
My approach blends creativity with UX insights — from low-fidelity exploration to refined interfaces that guide attention and emotion through motion, layout, and interaction.
I craft cohesive design systems that support scalability, accessibility, and a consistent user journey across platforms.
Each experience is built to feel effortless, purposeful, and aligned with both human behavior and business ambition.
03.
Delivery
Translating design intent into scalable, maintainable systems that perform in production.
I work hand-in-hand with developers to ensure seamless integration between design and code — transforming Figma components into living interfaces that reflect precision and purpose.
My focus is on building design languages that empower teams, improve velocity, and deliver pixel-perfect experiences with technical integrity.
Modern Design Stack
