Lead UI/UX Product Designer (AI-First, Full-Time)

Senior UI/UX Product Designer (AI-First) – Eight

Eight is a rapidly growing video-first social app headquartered in Portugal. We are entering a new phase of product development where design quality, user experience, and speed of iteration are central to our growth. We are hiring a Senior UI/UX Product Designer who can take full ownership of our product experience and lead the entire design function with independence and clarity.

This is a senior leadership role for someone capable of elevating Eight’s design standards and pushing the product forward without dependence on founders or engineering for direction.

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Role Overview

We previously worked with a designer who required significant guidance and hand-holding. We are now looking for someone fully autonomous, proactive, and able to lead the UI/UX team end-to-end.

Your mission is to create a world-class user experience, implement AI-driven design workflows, prototype rapidly, and ensure Eight delivers a seamless, modern, emotionally engaging product.

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Responsibilities

Leadership & Ownership
• Lead the entire UI/UX function and set design direction across the company.
• Operate independently, without requiring continuous supervision.
• Establish efficient workflows, best practices, and a strong design culture.
• Ensure design progress happens without founders needing to step in.

End-to-End Product Design
• Own the full design lifecycle: research, flows, wireframes, prototypes, and final UI.
• Deliver high-quality mobile designs (iOS & Android) ready for engineering.
• Build and maintain a scalable design system.

AI-Driven Product Innovation
• Use AI tools to speed up wireframing, prototyping, testing, and design iteration.
• Deploy no-code or low-code prototypes to experiment without needing developer builds.
• Identify and implement new AI tools that make the design process faster and more effective.

Research & UX Strategy
• Analyze competitors and market trends to identify UX opportunities.
• Strengthen onboarding, subscription flows, and the core video interaction experience.
• Apply behavioral and emotional design principles to increase conversion and retention.
• Present clear UX solutions based on data, psychology, and product objectives.

Cross-Functional Collaboration
• Work directly with the CEO and CMO to align design with product vision and growth strategy.
• Collaborate with engineers to ensure accurate implementation.
• Support marketing with assets and insights tied to acquisition and funnel optimization.
• Provide design input during roadmap and feature planning.

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Requirements

Must-Have
• 5+ years of UI/UX experience, primarily in mobile product design.
• A strong portfolio demonstrating modern, high-quality mobile interfaces.
• Expert proficiency in Figma (components, auto-layout, prototyping).
• Proven ability to work autonomously and deliver at senior level.
• Experience using AI tools for design, research, or prototyping.
• Strong understanding of user psychology, onboarding flows, and conversion-focused design.
• Ability to transform raw ideas into fully polished interfaces.

Nice-to-Have
• Experience with social, dating, or video-based apps.
• Familiarity with growth or monetization design.
• Ability to build interactive prototypes using no-code tools.
• Experience in fast-growing consumer tech environments.

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Who You Are
• Highly autonomous and proactive.
• Strong problem-solver who brings solutions, not questions.
• Capable of identifying UX gaps independently.
• Fast, detail-oriented, and execution-focused.
• Comfortable leading and shaping a design department.
• Someone who delivers consistently without bottlenecks or delays.

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How to Apply

Please send:
1. Your mobile app portfolio (mandatory).
2. Links to recent product design work.
3. Ai tools and systems you currently use.