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Hi there! I'm Cesar Marzullo Silvestre Fernandes, a Senior UI/UX Designer and Product Designer based in Rio de Janeiro, Brazil (Remote). I design user-centered digital products for mobile apps and responsive web platforms, with 20+ years of experience. I excel at competitive UX analysis, user research, wireframing, prototyping, usability testing, and Design Systems. I collaborate with cross-functional teams and developers to translate business requirements into intuitive interfaces, maintain Design Systems for consistency and scalability, and apply Human Interface Guidelines and Material Design. I'm an AI enthusiast and enjoy exploring AI-assisted design tools, with strong experience in Figma and a wide range of design tools.…Hi there! I'm Cesar Marzullo Silvestre Fernandes, a Senior UI/UX Designer and Product Designer based in Rio de Janeiro, Brazil (Remote). I design user-centered digital products for mobile apps and responsive web platforms, with 20+ years of experience. I excel at competitive UX analysis, user research, wireframing, prototyping, usability testing, and Design Systems. I collaborate with cross-functional teams and developers to translate business requirements into intuitive interfaces, maintain Design Systems for consistency and scalability, and apply Human Interface Guidelines and Material Design. I'm an AI enthusiast and enjoy exploring AI-assisted design tools, with strong experience in Figma and a wide range of design tools.

Cesar M S Fernandes

UX Designer, UI Designer, Product Designer, +5

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Hi there! I'm Cesar Marzullo Silvestre Fernandes, a Senior UI/UX Designer and Product Designer based in Rio de Janeiro, Brazil (Remote). I design user-centered digital products for mobile apps and responsive web platforms, with 20+ years of experience. I excel at competitive UX analysis, user research, wireframing, prototyping, usability testing, and Design Systems. I collaborate with cross-functional teams and developers to translate business requirements into intuitive interfaces, maintain Design Systems for consistency and scalability, and apply Human Interface Guidelines and Material Design. I'm an AI enthusiast and enjoy exploring AI-assisted design tools, with strong experience in Figma and a wide range of design tools.…Hi there! I'm Cesar Marzullo Silvestre Fernandes, a Senior UI/UX Designer and Product Designer based in Rio de Janeiro, Brazil (Remote). I design user-centered digital products for mobile apps and responsive web platforms, with 20+ years of experience. I excel at competitive UX analysis, user research, wireframing, prototyping, usability testing, and Design Systems. I collaborate with cross-functional teams and developers to translate business requirements into intuitive interfaces, maintain Design Systems for consistency and scalability, and apply Human Interface Guidelines and Material Design. I'm an AI enthusiast and enjoy exploring AI-assisted design tools, with strong experience in Figma and a wide range of design tools.

Available to hire

Hi there! I’m Cesar Marzullo Silvestre Fernandes, a Senior UI/UX Designer and Product Designer based in Rio de Janeiro, Brazil (Remote). I design user-centered digital products for mobile apps and responsive web platforms, with 20+ years of experience.

I excel at competitive UX analysis, user research, wireframing, prototyping, usability testing, and Design Systems. I collaborate with cross-functional teams and developers to translate business requirements into intuitive interfaces, maintain Design Systems for consistency and scalability, and apply Human Interface Guidelines and Material Design. I’m an AI enthusiast and enjoy exploring AI-assisted design tools, with strong experience in Figma and a wide range of design tools.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Beginner

Beginner

Beginner

Language

Portuguese

Fluent

English

Fluent

Work Experience

Web Designer at Remote Com

November 1, 2020 - February 1, 2022

Created a new visual identity and UI for a monitoring system used by state and federal law enforcement; developed brand and UI style guides; MVP screens and dashboards.

Web Designer at Go2Web Sistemas de Publicação Multimídia S/A

April 1, 2002 - September 1, 2013

Designed websites, landing pages, e-commerce, email marketing, and web systems using UX/UI trends; branding updates and CMS-driven workflows.

Product Designer at Growers

March 1, 2020 - August 1, 2023

Redesigned web and mobile products during the transition from UI Kit to a new framework, adopting Google Material; rebuilt component library and improved consistency across platforms; enhanced user flows and delivered to stakeholders.

UX/UI Designer at Veritext Legal Solutions

January 1, 2024 - July 1, 2025

Led cross-functional UX across four major initiatives focused on workflow optimization and product modernization; research and data analysis guided the creation of an Outlook plug-in, reducing internal workload and enabling self-service; designed branding and UI for a proprietary video-conferencing solution using Zoom SDK; conducted journey maps and system audits to modernize legacy platforms.

Web Designer at Fundação COPPETEC - COPPE/UFRJ

April 1, 2002 - September 1, 2013

Developed layouts and designs for portals and systems, web content management, account management, and project work. Supported multiple portals and internal tools with consistent UX/UI quality.

Senior UI/UX Designer at BairesDev

May 20, 2021 - July 20, 2025

Led competitive UX analysis and user research to identify opportunities and risks. Created product maps, user journeys, storyboards, and process flows to communicate design strategy and user experience. Designed low- and high-fidelity wireframes and UI for mobile apps and responsive web platforms. Built interactive prototypes in Figma and conducted usability testing to validate concepts and iterate. Collaborated with developers to ensure feasibility and pixel-perfect implementation. Collected feedback at each development stage and refined designs based on usage metrics and usability findings. Contributed to and maintained Design Systems to ensure consistency and scalability. Applied Human Interface Guidelines and Material Design where applicable.

UI/UX Designer at Sinn Technology

September 20, 2013 - February 20, 2021

Delivered end-to-end UX/UI solutions for B2B and consumer products. Produced mobile-first, responsive interfaces focused on usability and accessibility. Created simple graphics and interactive elements to enhance user experience. Worked closely with product managers and engineers to translate business requirements into intuitive interfaces. Delivered multiple projects (websites, dashboards, mobile apps, email marketing, and print media).

Senior UI/UX Designer at Sinn Technology

September 20, 2013 - February 20, 2021

Delivered end-to-end UX/UI solutions for B2B and consumer products. Designed mobile-first, responsive interfaces focused on usability and accessibility. Produced simple graphics and interactivity to enhance user experience. Worked closely with product managers and engineers to translate business requirements into intuitive interfaces. Delivered several projects (websites, dashboards, mobile apps, email marketing, and graphic design for print media).