Product design that turns research into clear interfaces.
I'm Gustavo Marques, a Product Designer focused on UI/UX, design systems and generative AI. I design web and mobile products, from health and fintech to web3 and animal welfare.
From problem to prototype: research, interface and system, with AI where it truly helps.
- 01
Product Design & UI
Web and mobile interfaces with high-fidelity prototyping in Figma, guided by usability, accessibility and conversion.
- 02
UX Research & Strategy
User research, personas, journeys, information architecture and navigation maps to decide what to build before designing.
- 03
Design Systems
Components, libraries and patterns in Figma to keep consistency and speed up delivery across web and mobile products.
- 04
Generative AI in the process
ChatGPT and Custom GPTs, Midjourney and Figma plugins for ideation, UX writing and high-fidelity prototyping.
Design theory that becomes interface: I collect the principles I use and show where each one appears.
- Nº 001
Fitts's law
INTERACTIONThe bigger and closer the target, the faster the tap. That's why navigation sits within thumb reach.
Seen in: Banco Next → - Nº 002
Hick's law
DECISIONMore options, more time to decide. One hero and one main action per screen.
Seen in: Ecodeath → - Nº 003
Miller's law
MEMORYGrouping into small chunks reduces cognitive load: labeled sections and short carousels.
Seen in: MedTalk → - Nº 004
Gestalt
PERCEPTIONProximity and similarity make the eye see groups without needing boxes.
Seen in: Resgatou → - Nº 005
Nielsen's heuristics
USABILITYTen practical rules to catch usability problems before users do.
Seen in: MedTalk → - Nº 006
WCAG
ACCESSMinimum 4.5:1 text contrast. Every case shows the math, including where it fails.
Seen in: Natureza & André Cury →
I'm Gustavo Marques, and I design digital products people can actually use.
I'm a Product Designer (UI/UX), a Bachelor of Design student at UFRN and an IT technician from IFRN. I create interfaces, scalable design systems and information architecture for web and mobile products.
Every project here shows the reasoning behind the screens: color theory, typography, visual hierarchy, usability heuristics and accessibility. Day to day I apply generative AI to ideation, microcopy and prototyping.
- Education
- Design (UFRN, in progress) · IT (IFRN)
- Courses
- UI/UX Design Specialist (Cubos Academy) · Figma Design Systems and UX Design (Alura)
- Languages
- Portuguese native · English fluent · Spanish intermediate
- Location
- Natal, RN, Brazil
- 03/2024 – Present
Freelance Product Designer & UI/UX Designer
IndependentIN PROGRESSUser research, wireframes, navigation maps and high-fidelity prototypes for digital products, with GenAI for ideation and microcopy (UX writing).
- 05/2023 – 02/2024
Art Director & Visual Designer
Sanus Marketing MédicoQUEST COMPLETEVisual ecosystems and institutional materials for health clinics, with visual responsiveness and adherence to brand guidelines and industry regulations.
- 2022 – 2023
UI/UX Designer (volunteer) and Image Editor
Orby Co. · Click FotografiasQUEST COMPLETEWeb and mobile interfaces in Figma based on usability tests, and image retouching with quality control of visual assets.
- Figma
- Design Systems
- Wireframing
- High-fidelity prototyping
- UX Research
- UX Writing
- Information architecture
- Accessibility (WCAG)
- Color theory
- ChatGPT / Custom GPTs
- Prompt engineering for design
- Midjourney
- Photoshop
- Illustrator
- Lightroom
- Miro