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Júlia SasakiJS
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Júlia Sasaki

@jliasasaki

UX Designer at Mercado Libre, redesigning Mercado Pago card journeys across four Latin American countries.

Brazil
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At Mercado Libre (Mercado Pago), I design end-to-end debit and credit card experiences across Argentina, Brazil, Chile and Mexico, with a focus on activation, recurring usage and churn reduction.

I redesigned key card lifecycle journeys, including first-use activation, renewal and contactless payments, using user interviews, competitive benchmarking and data analysis. I also defined the visual system for debit and credit cards and built an icon library aligned with the Andes design system.

I use Cursor, Codex and Claude throughout my design process, from project conception to handoff, and work with BigQuery for data analysis. My process also includes research, prototyping, usability testing and accessible handoff to engineering.

Previously, at Grupo SOMA / FARM Rio Global, I designed e-commerce experiences for web and mobile and used behavior insights to improve usability and conversion. At DevSquad, I conducted research and testing for product launches and redesigns, and built and documented a Design System.

Experience

Work history, roles, and key accomplishments

Education

Degrees, certifications, and relevant coursework

FIAP logoFI

FIAP

MBA, Future-Centered Design: UX, Innovation & Technology

2026 -

Activities and societies: 1st place at Networking Day (SpeedThon Executivo)

Pursuing an MBA in Future-Centered Design with a focus on UX, Innovation, and Technology, expected to complete in February 2027. Awarded 1st place at Networking Day (SpeedThon Executivo).

Ironhack São Paulo logoIP

Ironhack São Paulo

Bootcamp, UX/UI Design

2021 - 2022

Completed a UX/UI Design Bootcamp at Ironhack São Paulo from November 2021 to April 2022.

MD

Mergo Escola de Design

Certification, UX Design

2021 - 2021

Completed a UX Design Certification at Mergo Escola de Design from May 2021 to August 2021.

Universidade do Vale do Paraíba (UNIVAP) logoUU

Universidade do Vale do Paraíba (UNIVAP)

Bachelor of Arts, Fashion Design

2013 - 2017

Earned a Bachelor of Arts in Fashion Design from Universidade do Vale do Paraíba (UNIVAP) from 2013 to 2017.

Tech stack

Software and tools used professionally

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