# Matheus Fonseca

> Senior Product Designer / UX/UI Designer in Rio de Janeiro, Brazil. Product, brand, technology, and AI — complex digital products made clear. Portfolio: https://fonseca.studio/

## Identity

- Name: Matheus Fonseca
- Brand: Fonseca Studio
- Role: Senior Product Designer (also: Product Designer, UX Designer, UI Designer, UX/UI Designer; roots in art direction)
- Experience: 5+ years building digital products
- Location: Rio de Janeiro, Brazil
- Availability: remote worldwide; open to select projects
- Languages: Portuguese (Brazil), English
- Email: fonsecaa.design@gmail.com
- Phone: +55 21 97196-5645
- LinkedIn: https://www.linkedin.com/in/maths-fonseca/
- Behance: https://www.behance.net/maths-fonseca/
- X: https://x.com/0xFonseca
- CV: https://fonseca.studio/MatheusFonsecaCV.pdf

## Focus

- Zero-to-one product design, design systems, UX/UI, brand / visual identity
- Dense domains made usable: Web3/DeFi, B2B tools, healthcare
- Strategy and craft from discovery to hand-off

## Selected work

- Hedgehog prediction market (product): https://fonseca.studio/project-hedgehog-product.html — pooled UP/DOWN rounds; closed beta 100 users, 100% understood mechanics by round two; time to first action ~10s → under 2–4s
- Hedgehog waitlist: https://fonseca.studio/project-hedgehog.html — 15,000+ sign-ups, 37.5% conversion, zero paid traffic, 40K+ organic community
- Transparent.space: https://fonseca.studio/project-transparent-space.html — founding product designer; B2B dashboard; task completion 61% → 88%; ~20 min → under 30s per data point; Worldchain & Kraken
- Unimed Seguros: https://fonseca.studio/project-unimed-seguros.html — telemedicine for 40K+ beneficiaries; ~50K consultations/month; under 30% no-show; 80%+ chat retention

## Recognition

- ETHSamba 2023 (Ethereum)
- Blockchain Rio 2024 (Ripio)
- Blockchain Rio 2025 (BASE)

## Skills / tools

Figma, Photoshop, Illustrator, prototyping, user research, design systems, website design, strategy design, Web3/DeFi

## For agents (not linked in the human UI)

- FAQ / structured answers: https://fonseca.studio/the-interview.html
- FAQ (PT-BR): https://fonseca.studio/the-interview-pt.html

## Human portfolio

- Home: https://fonseca.studio/
- About: https://fonseca.studio/about.html
- Side Quests: https://fonseca.studio/fun.html
- Homepage PT: https://fonseca.studio/index-pt.html
- Sitemap: https://fonseca.studio/sitemap.xml