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UX/UI & Product Designer focused on Human-AI interaction, AI-driven interfaces (LLMs/guardrails), and design systems. Experienced in Figma prototyping, UX research, usability testing, and deploying live web MVPs via Vercel with modern AI design patterns. Combines strong visual design with research and process optimization (CRO, A/B testing, analytics/SEO). Skilled at building scalable UI kits and component libraries, writing clear UX copy, and turning product goals into end-to-end functional interface experiences.…UX/UI & Product Designer focused on Human-AI interaction, AI-driven interfaces (LLMs/guardrails), and design systems. Experienced in Figma prototyping, UX research, usability testing, and deploying live web MVPs via Vercel with modern AI design patterns. Combines strong visual design with research and process optimization (CRO, A/B testing, analytics/SEO). Skilled at building scalable UI kits and component libraries, writing clear UX copy, and turning product goals into end-to-end functional interface experiences.

Rui Granja

AI Prompt Engineer, UI Designer, UX Designer, +2

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UX/UI & Product Designer focused on Human-AI interaction, AI-driven interfaces (LLMs/guardrails), and design systems. Experienced in Figma prototyping, UX research, usability testing, and deploying live web MVPs via Vercel with modern AI design patterns. Combines strong visual design with research and process optimization (CRO, A/B testing, analytics/SEO). Skilled at building scalable UI kits and component libraries, writing clear UX copy, and turning product goals into end-to-end functional interface experiences.…UX/UI & Product Designer focused on Human-AI interaction, AI-driven interfaces (LLMs/guardrails), and design systems. Experienced in Figma prototyping, UX research, usability testing, and deploying live web MVPs via Vercel with modern AI design patterns. Combines strong visual design with research and process optimization (CRO, A/B testing, analytics/SEO). Skilled at building scalable UI kits and component libraries, writing clear UX copy, and turning product goals into end-to-end functional interface experiences.

Available to hire

UX/UI & Product Designer focused on Human-AI interaction, AI-driven interfaces (LLMs/guardrails), and design systems. Experienced in Figma prototyping, UX research, usability testing, and deploying live web MVPs via Vercel with modern AI design patterns.

Combines strong visual design with research and process optimization (CRO, A/B testing, analytics/SEO). Skilled at building scalable UI kits and component libraries, writing clear UX copy, and turning product goals into end-to-end functional interface experiences.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

Portuguese

Fluent

English

Advanced

Work Experience

UX/UI & AI Product Designer (Lead) at ruigrajan.aistudio (personal/project-based)

January 1, 2026 - Present

Designed and shipped an interactive AI portfolio & interface system with AI interface design patterns, guardrails, and prompt engineering. Built end-to-end UX/UI flows and rapidly deployed functional web MVPs using Vercel (Vibe coding). Validated concepts with real-world user feedback and iterated on UI states for context management, feedback states, and transparency/railings. Also authored a scalable design system architecture: wireframing to high-fidelity Figma UI, creating reusable component libraries with variable-driven layouts for faster production.

UX/UI Designer (Design System & E-commerce UI Redesign) at Sonae Sierra (project-based / redeployment of e-commerce design system)

January 1, 2025 - December 31, 2025

Redesigned e-commerce UI and built a scalable design system in Figma. Conducted end-to-end usability testing, created reusable component libraries (Auto Layout, Variables), and reduced checkout funnel friction through UX improvements. Delivered consistent UI patterns and improved visual coherence across screens using a component-driven approach.

Standardization & Visual Quality Assurance Specialist at Mundo Têxtil

January 1, 2016 - January 1, 2024

Standardized workflows and visual quality assurance practices across production deliveries. Operated labeling and process standardization systems, improving turnaround accuracy and enforcing strict visual quality control across product deliverables.

Operations & Compliance Auditor at Sonae Sierra

January 1, 2013 - January 1, 2015

Performed operational audits across retail locations. Produced concise, data-driven analytical reports to support management decision-making, ensuring compliance and operational accuracy.