Guilherme Hoff Kerber

Partnered with early-stage fintech, SaaS, and AI startups from problem framing through handoff, covering user research, UX/UI, design systems, and prototyping directly with Claude Code.

• Building Origo AI synthetic user interview tool. From creating scripts to synthesised data reports.
• Building TrustCab, an Android/iOS transportation app that helps people earn full ride earnings.

Owned product design across discovery, research, UX/UI, design systems, prototyping, and design QA, supporting 50+ products from zero to launch across fintech, SaaS B2B, AI, Web3, and gaming.

• Improved landing page conversion from 3.3% to 5.7% through a design audit and implementation work on Hydraloop.
• Launched a P2P credit market for a crypto wallet and reached a 32% fill rate in the first month (LoanFunded ÷ OfferCreated).
• Updated the multi-wallet and multi-account staking flow from v1 to v2, reworking the user journey and increasing staking completion rate by 23% in 30 days.
• Designed Orderbook and Swap features for a crypto wallet, keeping simple and crypto-savvy paths separate.
• Reworked onboarding for an AI agent tool for creators, reducing steps from 9 to 7 by adding smarter fields and removing unnecessary requirements.
• Defined agent autonomy rules, guardrails, and human-in-the-loop approvals for Klutch.ai.

Led product design for a photographers platform with 100k+ users, owning integrated e-commerce, a new blog system, and the rebrand while the active userbase doubled from 100k to 200k over 2.5 years.

• Built and maintained the platform’s design system while working closely with engineering from early definition through implementation and iteration.
• Used user research and support data to prioritize what to build next, then usability tested new flows before release.

Designed conversion-focused landing pages and digital experiences for automotive clients.

• Built a reusable design-code library from repeated client patterns, reducing project turnaround from 2 weeks to 5 days.

Designed interfaces for internal systems and client web projects, with basic front-end development.

The study focused on user experience, artificial intelligence, and business oriented results.

The study focused on creative design, branding, and graphic design, applied to visual identity development and brand communication.

Applied study of AI in product design, covering user experience in AI tools and UX research practices.

User experience certificate to continue learning about user centered designs principles and research frameworks.