About Jonathan
I’m a Senior UI/UX Product Designer with 10+ years of experience leading UX strategy, product strategy, and scalable design systems across AI-powered tools, SaaS platforms, and mobile applications.I specialize in turning complex workflows into intuitive, high-performing products that drive adoption, accelerate delivery, and scale across organizations. My work spans zero-to-one MVPs, enterprise platforms, AI internal tools, and high-traffic consumer products.Over the past decade, I’ve partnered closely with Product, Engineering, Data, and Executive stakeholders to:
• Lead end-to-end UX strategy and product design• Build Figma-based design systems and component libraries
• Drive user research, usability testing, and data-informed design
• Ship AI-powered tools used at scale• Improve conversion, adoption, and operational efficiency
Recent highlights include:
• Designing 5 AI-powered tools at Sanofi, reducing document creation time by 80%
• Increasing review completion by 65% at GetYourGuide
• Scaling community reach from 900 to 35,000+ users at Climate HourI’m strongest in environments where product strategy, technical complexity, and human-centered design intersect.
📍 Barcelona | Open to EU & US remote
💬 Languages: French (Native), English (C2), Spanish (B2)
🔗 Portfolio:
French
Native or bilingual
English
Native or bilingual
Can work on-site
Barcelone (up to 10km)
Experience
- SanofiSenior UI/UX Product DesignerMEDICALNovember 2023 - Today (2 years and 7 months)Barcelone, Spain
- Led end-to-end UX strategy and product design for five AI-powered internal tools, establishing scalable design systems and reusable UX patterns adopted across multiple product teams.
- Reduced document creation time by up to 80% through workflow redesign and automation.
- Planned and executed biweekly user research and usability testing with medical writers, achieving 100% pilot adoption within the first month.
- Designed and shipped 11 production-ready features using Figma, interactive prototyping, and accessibility-aware design.
- Built a self-service component library to accelerate future AI product delivery across teams.
- GetYourGuideSenior UI/UX Product DesignerENTERTAINMENT AND LEISUREAugust 2023 - November 2023 (3 months)Berlin, Germany
- Co-led UX strategy and end-to-end redesign of the reviews experience using information architecture, interaction design, and prototyping.
- Increased review completion rates by 65% through a photo-first, story-driven experience.
- Partnered with Product Managers, Engineers, and key stakeholders in an Agile/Scrum environment to accelerate roadmap execution.
- AlpakasFounding UI/UX Product DesignerE-COMMERCESeptember 2022 - March 2023 (6 months)Berlin, Germany
- Owned the full product design lifecycle including UX research, product strategy, wireframing, high-fidelity UI design, prototyping, and developer handoff.
- Built and scaled a Figma-based design system and component library, reducing design-to-development handoff time by 25–30%.
- Led cross-functional collaboration with CX, Product Management, and Customer Care to ship high-impact, user-driven product improvements.
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