About | Lui Spadarotto | Product designer, systems thinker

My perspective

I'm a product designer with 10+ years of experience across fintech, healthcare, AI, gaming, mobility, travel, and enterprise software. I've worked on products reaching 10M+ users across 30+ countries, from early-stage startups to established international platforms.

A lot of my work involves making complicated products easier to use. Payment journeys with different rules across markets, healthcare platforms that share the same design system, or AI products where we're figuring out how people should interact with the technology in the first place.

I'm currently a Senior Product Designer at Kaizen Gaming, working within Accounts & Payments and leading the design efforts for a global redesign of the Withdrawals experience. My work also covers new payment features, Card and Bank Management, design systems, and the documentation that helps teams make sense of complex product decisions.

Before that, I held Lead Product Designer roles at Medlify, where I built a white-label design system supporting 4+ healthcare products, and Talka.ai, where I helped take an AI-powered product from concept to its first release.

I've also worked as a Product Manager and Front-End Developer. That experience has stayed with me, especially when it comes to understanding how design decisions affect the product beyond the interface.

Work experience

View all work experience

Kaizen Gaming

Senior Product Designer, Account & Payments

Feb 2025

Present

Leading design across Payments within the Accounts & Payments design team, shaping multi-market flows and supporting regulatory alignment. Partnering with Product, Compliance, and Engineering to balance UX quality with legal and technical constraints.

Owned end-to-end UX for complex Payments initiatives across markets, adapting flows to local compliance and PSP constraints while maintaining a coherent global pattern language;
Led work on high-complexity management spaces such as Card Management and Bank Management, with recognized architectural thinking beyond feature-level execution;
Built and maintained a Payments Knowledge Hub in Confluence to document flows, terminology, decision logic, and edge cases, creating a shared source of truth and reducing repeated clarification cycles;
Contributed to the evolution of design-system structure, naming, traceability, and theming foundations, including audit tooling that improved governance and scalability across product areas;
Supported measurable business impact across Payments, including deposit conversion gains, reduced time-to-deposit, stronger withdrawal performance, improved instant-withdrawal efficiency, and lower payment-related contactability.

Medlify

Lead Product Designer

March 2023

November 2024

Led UX systems for modular healthcare platforms, including Versalie™ by Kenvue (formerly Johnson & Johnson Consumer Inc.), a menopause support and education platform serving 1.3M+ U.S. users annually. Focused on regulatory compliance, product flexibility, and operational scalability across multiple clients.

Built and scaled a white-label design system across 4+ products, improving delivery speed by 57% and reducing design errors by 60%;
Led end-to-end UX design for consumer and enterprise healthcare platforms, aligning with C-level strategy and regulatory requirements;
Contributed to Versalie™ design system, supporting menopause education, curated product shopping, and access to trained specialists.

Talka.ai

Lead Product Designer

November 2021

December 2022

Designed and launched Talka.ai — an AI-driven platform for communication insights — from 0 to 1. Led the UX direction and product foundations in a fast-moving startup, aligning continuous discovery with engineering and AI research.

Led UX strategy and design architecture for Talka.ai’s first product version, aligning vision with technical feasibility in a fast-paced AI startup;
Collaborated with AI specialists to turn behavioral insights into functional, human-centered interfaces;
Embedded lean research into rapid iteration cycles, contributing to Talka.ai’s inclusion in CB Insights’ Jan 2023 AI 100 list.

Better, together

View all references

Luiz Fernando Pilz

Managed Lui direclty @ Mezocubo

Lui is an excellent professional, doing everything very quickly and creatively. Keeps attention to detail, widening scope possibilities, knows how to receive feedback and is very proactive. In addition to all these qualities, she is always ready to help and learn.

Felipe Accorsi

Managed Lui direclty @ BV Bank

Lui was part of one of my teams where she played a great role in the bank's main product. She was always very curious, close and connected with the team, she was always looking for solutions and the best way to design and defend her points of view.

Her great qualifications are linked to UX and UI design, motion design, organization of complex contexts, among others. Always happy and with a smile on her face, she infects the team with a good culture of sharing. I would like to have her on my team again.

— Written on a recommendation letter

Rafael Mathias

Managed Lui direclty @ Shell Brazil / Raízen

As a Product Designer, she was able to analyze the journey of gas station users and propose solutions to improve the customer fueling experience here in Brazil, showing seniority through all stages of the project. She also created data monitoring panels and a performance monitoring tool for each of our retail partners, that were highly praised by everyone in the company.

It would be a pleasure to work again with Lui on any project.

— Written on a recommendation letter

Always learning

View all certifications

Mobile UX strategy

Mobile UX Strategy: How to Build Successful Products

IxDF - Interaction Design Foundation · Issued Jul 2025

Design and usability

Dynamic User Experience: Design and Usability

IxDF - Interaction Design Foundation · Issued Jun 2025

Accessibility: How to Design for All

IxDF - Interaction Design Foundation · Issued Jun 2025