Guilherme Paixão

Health-tech SaaS platform serving 1,000+ medical wellness clinics across EHR, scheduling, payments, charting, inventory, and marketing in a single product. Built a comprehensive design system from scratch (Figma + Storybook) with reusable components, tokens, and guidelines as a single source of truth across the platform. Shipped production AI features by generating clinic interfaces from structured data using LLMs, and created smart dashboards to reduce practitioner navigation time. Delivered AI-assisted charting in production for 1,000+ clinics, driving 0-to-1 product work from concept to shipped features. Reduced engineering handoff cycles by ~40% through consistency and measurable design-system improvements. Achieved product stabilization enabling a 472% revenue growth and supported a 383% increase in client base within six months by positioning the platform as a vital efficiency tool for large-scale B2B organizations.

AI-enabled ad agency pairing expert marketers with proprietary tools to deliver top-tier, profitable performance for global brands. Optimized onboarding and subscription flows using conversion psychology and data-driven design iterations. Lifted Paywall View Rate from 35% to 70% through onboarding funnel optimization and Mixpanel event data analysis. Designed AI-powered tools to automate creative decision-making and streamline the branding/UX process. Built complex interfaces for Leaderboards, Ad Creative Clusters, and Creative Ocean (AI-driven ideation). Developed a design system integrated with LLMs to ensure visual and logical consistency across AI outputs, and engineered custom Claude Skills to automate branding guidelines and UX-thinking frameworks. Reduced manual idea-to-strategy bridging time, enabling faster creative execution for marketing teams. Achieved 500+ organic installs within the first week of launch for Coco and established an AI-integrated workflow (Claude Code + Fig

Worked on Shell’s digital rewards and loyalty app, leading high-impact design initiatives for Shell Box. Led an end-to-end process to define the loyalty framework and create a specialized experience for the truck driver segment, ensuring the platform was tailored to professional driver needs. Designed a segmented loyalty experience with specific rules and goals, distinct from passenger vehicle use cases. Established foundational UI/UX patterns that enabled Shell Box Club to scale its rewards architecture globally. Launched the core loyalty layout, increasing engagement by 34% through personalized reward paths. Managed the end-to-end redesign of the coupon module, replacing an outdated interface with a data-driven, conversion-focused UI. Drove a 20% boost in participation and increased the “burn rate” of loyalty points, impacting company revenue and LTV (lifetime value).