00/Introduction
Senior Product Designer
Designing digital products where strategy, systems and experience meet. Hackathons winner, former American football competitor, and product designer inspired by fashion, architecture, culture, music and food.
Discovery → IA → systems → hand-off. Craft that holds up in production.
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Founding Product Designer for an institutional Web3 platform that helps liquidity providers evaluate Market Maker performance. Designed end-to-end, from discovery and UX architecture to a full design system. Task completion improved from 61% to 88% across product iterations.
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End-to-end product design for a Web3 prediction market, from UX architecture and interaction design to a 120+ component system. Task completion improved from 61% to 88% across iterations. Includes a separate conversion-focused waitlist landing with 37.5% conversion rate.
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Brand identity and scalable visual system for an early-stage startup, covering color, typography, iconography, and component tokens. Delivered across a 6-week timeline to support a go-to-market launch.
View project ↗“Fonseca has been an exceptional designer to work with. He combines strong visual intuition with a clear understanding of product goals, which consistently results in designs that are not only visually striking but also practical and user-focused. What stands out most is his ability to translate abstract ideas and rough direction into clean, well-thought-out design systems. He works fast without sacrificing quality, communicates clearly, and iterates thoughtfully based on feedback.”
“Fonseca is my go-to designer for everything. I explain it once, and he comes back with something insanely premium. Zero back-and-forth, always top-tier.”
“Fonseca is a hardworking guy and I decided to hire him for AI Agent Arena because of his outstanding skills on UX/UI and also his strong communication skills which led to the success of v1 for AI Agent Arena.”
“Working with Fonseca was a great experience. He took our brand positioning and translated it into a cohesive visual identity system—defining clear standards and templates that made it so much easier to create social media content and apply our brand consistently across different touchpoints. His ability to understand not just what we needed, but why we needed it, made all the difference. Highly recommended.”
“Fonseca has been an exceptional designer to work with. He combines strong visual intuition with a clear understanding of product goals, which consistently results in designs that are not only visually striking but also practical and user-focused. What stands out most is his ability to translate abstract ideas and rough direction into clean, well-thought-out design systems. He works fast without sacrificing quality, communicates clearly, and iterates thoughtfully based on feedback.”
“Fonseca is my go-to designer for everything. I explain it once, and he comes back with something insanely premium. Zero back-and-forth, always top-tier.”
“Fonseca is a hardworking guy and I decided to hire him for AI Agent Arena because of his outstanding skills on UX/UI and also his strong communication skills which led to the success of v1 for AI Agent Arena.”
“Working with Fonseca was a great experience. He took our brand positioning and translated it into a cohesive visual identity system—defining clear standards and templates that made it so much easier to create social media content and apply our brand consistently across different touchpoints. His ability to understand not just what we needed, but why we needed it, made all the difference. Highly recommended.”