01
CoinFello
CoinFello — United States — 2025 — 2026
Built the design system and implemented it in code. A DeFi product with an AI agent at the centre of it.
Design Systems · Front-end · UI/UX
Product Designer & Front-end DeveloperMaceió, Brazil
I design productsand ship the code.
Product designer and front-end developer from Brazil. I've been responsible for the design system at two companies and worked on the front-end at both — most recently with US teams at CoinFello and HyperPlay, and before that on Payday 2 at Starbreeze.
- Product design
- Design systems
- React & Next.js
- TypeScript
- Accessibility
- Motion
- Open source
A few numbers, so the rest of the page has something to stand on.
- 2010
- Designing sinceGraphic, then product and front-end
- 500k+
- People using what I designHeroic Games Launcher, the open-source app I design and build for
- 2
- Design systems owned and implementedAt HyperPlay and CoinFello
- 3
- Languages I work inEnglish, Portuguese, Spanish
01Selected work
Five pieces of work, told properly.
02Capabilities
One person across the whole hand-off.
01
Product Design
Framing the problem before the pixels: user research and interviews, flows, prototypes, and four years of living with the same product rather than handing it off.
- User research & interviews
- Discovery & framing
- User flows
- Prototyping
- Game & launcher UI
02
Design Systems
Responsible for the design system at two companies. At CoinFello I built it and implemented it in code myself. Tokens, components, documented states, kept usable by the engineers consuming it.
- Design tokens
- Component libraries
- Figma architecture
- Documentation
- WCAG 2.2 AA
03
Front-end Engineering
I build what I design. Typed React, design systems implemented from inside engineering, and animation that respects reduced-motion. I wrote production front-end by hand for a year before I used AI for any of it — I work well either way, and I review what the assistant writes because I know what the work costs without it.
- React & TypeScript
- Next.js
- Tailwind CSS
- SCSS
- Hand-written, no AI
- AI-assisted when it earns it
03Working together
Built for distributed teams.
I work with US companies, and have since 2022 — on teams whose members sat across the US, Europe and Latin America, several time zones in one standup. Design reviews in English, async written rationale by default, and code in the same repository as the engineers I design for.
- EnglishFull professional
- PortugueseNative
- SpanishProfessional working
- Engagement
- Full-time · Contractor · PJ/B2B invoicing
- Overlap
- UTC-3 — a full shared workday with US Eastern
- Track record
- Remote since 2022 with teams spread across the US (Texas, California, San Juan), Europe and Latin America
- Languages
- English · Portuguese · Spanish
- Also
- Qualified lawyer, specialising in digital law — data protection, AI and blockchain
- Hand-off
- Figma to production React — no translation layer
Next step
Let's build something that ships.
I am looking for full-time roles or contractor engagements with US companies. Since 2022 I have worked remotely with US teams whose members sit across the US, Europe and Latin America — the time zones are a problem I have already solved.