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Strategy and craft, in the same pair of hands.

Designing next to founders and teams, from first idea to launch. I see where the product should go next, shape the MVP, and prototype it with AI until it's real.

Selected cases

Work experience

Clipboard Health

Oct 2024 - Present

Lead Product Designer

Product design and direction for new ventures: Maple, Arca, Logcare and Taryn

Lead design across 4 new products with a team of up to 15, from the shared design system to AI copilots like SmartOps.

Mosaic

Apr 2022 - Jul 2024

Senior Product Designer

Resource management SaaS

Created the Tile design system, cutting engineering time by 30%, and co-led the Mosaic Hub redesign that raised adoption by 21%.

ioasys

Dec 2020 - Mar 2022

Lead Product Designer

Allocated to Saúde iD, Grupo Fleury's digital health platform

Led Consultório ID at Grupo Fleury's Saúde iD, tripling daily appointments, and its design system team.

What people say about working with me

“I can say unequivocally that Gui has a mastery of how to create modern, eye catching web interfaces, and also that Gui is both creative and gritty enough to solve any problem that get in his way, particularly when it came to writing code himself.”

Max LeisersonVP of Technology at Mosaic

“Gui (Guilherme) is one of the most incredible UI/visual designers I have worked with in my career thus far. With this understanding of how design meets function, Gui can be your go to person when it comes to designing unique, beautiful and functional web/mobile applications.”

Salina KhathaDesign Manager

“As a Jr. Designer, I looked up to Gui and his abilities all the time! He has a gift of elevating platforms and their visual quality through his designs. He has an high attention to detail as a designer, which shows in his designs and his documentation.”

Joel NeviusProduct Designer
Photo of Gui Silveira

Hi, I'm Gui

Design for humans, not just users.

I love to create products that adapt to people, not the other way around. Getting to know users so well that the product almost feels like it's reading your mind. Connecting business needs and unpredictable human behavior is the most fun challenge for me!

A beautiful, well-crafted product is strategy, and usability is non-negotiable. Why do we have to choose between one or the other? And of course, a pinch of delight in every interaction is what turns a product into an experience.

That's what I believe. And now, with the power of AI, I don't just design products that make people say WOW. I build them.

In numbers

10+

Years

Designing digital products, since 2011

50+

Projects

Across 7 industries, from healthcare to events

1.3k

Commits

Shipped with AI agents, as a designer

15

People

Designers and engineers in the team I lead