Design × engineering

I design interfaces.
I build AI systems.
I connect the two.

I’m Cadu, a UX/UI & AI Systems Engineer at Bolha. I work across interfaces, conversational AI and physical experiences, from how people interact to the software that makes it work.

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Cadu Fantin seated against a geometric mesh wall.

Cadu FantinSão Paulo, Brazil

01Selected work

Ideas, in the world.

Robotic handwriting, social robots and AI at a music festival. A closer look at what I contributed and how it came together.

01The Shakespeare BIC

Rebuilding Shakespeare’s handwriting for a robot.

I reconstructed handwriting attributed to Shakespeare as a single-line font, then helped tune it for a robot writing Romeo and Juliet with one BIC pen.

2025–2026AI-assisted design · Generative typography · Robotic writing

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02PRS / Tobias

Designing social robots.

I helped shape the conversation, behaviour and operator tools behind PRS, the system that gives Tobias memory, perception and physical expression.

2024–ongoingExperience design · Conversational interaction · Product development

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03OpenAI at Lollapalooza Brasil

Making ChatGPT physical.

I helped integrate OpenAI’s software into the camera-and-print flow and contributed to a festival assistant people could call from a public phone.

2026Creative technology · Experience design · Conversational design

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Earlier work · BehanceWhere I started.Motion, branding and early UX/UI work. A look at how my practice took shape.Browse on Behance

Projects · GitHubWhat I’m building.Tools, prototypes and experiments. Some finished, some still finding their shape.Browse on GitHub

02About

From how it feels
to how it works.

My background spans motion, UX/UI, interaction design and writing. At Bolha, I bring that design practice into AI systems engineering: shaping interfaces, conversational behaviour and the software behind physical experiences.

That can mean refining the tools used to operate a social robot, connecting software to a camera-and-print flow, or rebuilding handwriting a robotic arm can reproduce. I work through those details with people from other disciplines, keeping the experience and the implementation connected.