Sanofi — Making generative AI useful and trustworthy in healthcare

Technology
Younited — A credit application journey people actually finish

Technology
Chugai Pharmaceutical — Collecting clinical trial data without errors or fatigue

Technology

Daniel César Vieira · Now booking for Jan 2027

I help product teams turn AI capabilities into useful, trusted product experiences

Customer Experience & Strategy · Making AI useful and trusted in healthcare and finance · 20+ years

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I help healthtech and fintech teams make complex data and AI easier to understand and use. I connect user research and business goals to shape clear product experiences.

With 20+ years of experience, I’ve worked on AI-enabled products and partnered with Sony Music, Younited, Leetchi and Chugai Pharmaceutical. Based in Paris, I work with international teams.

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How I connect user needs, product decisions and business goals.

AI-Driven Experience Strategy

I help teams design AI-enabled workflows that support clear decisions, user trust and appropriate human oversight.

Research & Data-Driven Decisions

I use qualitative and quantitative research, usability testing and, when appropriate, experimentation to inform product decisions.

Conversion & Retention

I help teams design journeys around adoption, conversion and retention across complex digital products.

Regulated Environments

Experience designing digital products in regulated healthcare and financial environments, with attention to privacy, accessibility and operational constraints.

Freelance missions for healthtech and fintech teams: AI-driven CX, CX and product strategy for enterprise and consumer apps, UX research and design systems. I work in English, French, Portuguese and Japanese, and I’ve partnered with product, engineering and science teams in Paris, Tokyo and the US.

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Also on Malt · LinkedIn · Toptal

Voices of Appreciation

“Excellent work from Daniel! I can only warmly recommend his services: rigour, attentiveness and professionalism set the pace of our collaboration. We will not hesitate to call on him again!”

Nada — VERA (via Malt, 5/5) · translated from French
“Very relevant experience-based feedback that helped us move forward and improve the experience! Thank you, Daniel!”

Margot — Deep Belief (via Malt, 5/5) · translated from French
“Daniel is creative and proactive in putting forward proposals in his work”

Richard Bliah, SIAMA (architecture), Tokyo · translated from French