Guilherme is available for hire
Hire GuilhermeGuilherme Cerqueira
Verified Expert in Design
Designer
Location
São Paulo - State of São Paulo, Brazil
Toptal Member Since
January 27, 2022
Guilherme is a seasoned UI/UX product designer with over 15 years of experience. He has a proven track record in designing for millions of users at Booking.com and helping numerous SaaS startups achieve success through his user-centered and data-informed design solutions. With extensive experience in web and mobile app design, including UX thinking, research, wireframing, and prototyping, Guilherme has worked with a range of companies with clients such as GSK, Unilever, Danone, Nestlé, and BRF.
Portfolio
Work Experience
Senior Product Designer
2023 - PRESENT
Data Visualization AI
- Worked directly with the CPO to define the product's user experience for the web and mobile app from the ground up, including building the product roadmap and features.
- Created wireframes, low-fidelity mockups, UI elements, and high-fidelity MVP prototypes for the company to prospect clients and build a pitch deck.
- Designed 200+ screens with flows and interactions to understand user behavior and to communicate the content to the client.
- Designed the MVP for the main product and the admin dashboard.
- Produced multiple iterations based on stakeholder and user feedback.
- Set up the design vision with new features and use cases.
- Created fully functional, high-fidelity prototypes for both the web and mobile app.
- Worked closely with front-end developers to implement the features.
Technologies: Figma, User Journeys, User Flows, UX Wireframes, B2B, Web Design, Data Visualization, SaaS, Artificial Intelligence (AI), Design Workshops, UX Design, Conversational UI, Conversational UX, Conversational Design, Conversational Interfaces, AI Design, Artificial Intelligence as a Service (AIaaS), Chatbots, ChatGPT, User Experience (UX), App Design, UI Design, Design Systems, Wireframing, Prototyping, Dashboards, SaaS Design, Mobile Design, User Stories
Lead Product Designer
2023 - 2023
New Fitness App concept
- Developed comprehensive user flows, ensuring that every single interaction within the fitness app was thoughtfully designed.
- Created detailed wireframes serving as the architectural framework for the app, ensuring a solid foundation for an intuitive and user-friendly interface.
- Designed lo-fi and hi-fi prototypes, allowing for hands-on testing, feedback gathering and refinement.
Technologies: Design Leadership, UX Design, UI Design, Wireframing, User Stories, User Flows, Market Research, Graphic Design, Figma, User Experience (UX), App Design, Prototyping, Mobile Design
Senior UI/UX Designer
2023 - 2023
eSpeakers.com, Inc.
- Designed a new user-friendly booking experience for the platform, focusing on conversion rate optimization.
- Redesigned the whole website and platform from scratch for web and mobile.
- Created high-fidelity prototypes ready for developer handoff, including colors, typography, new components, and assets.
Technologies: Web Design, Responsive Web Design (RWD), Conversion Rate, Conversion, UI Design, UX Design, Mobile UX Design, eCommerce, eCommerce UI, eCommerce UX, Conversion Rate Optimization (CRO), Figma, Web App UX, User Experience (UX), User Experience Strategy, UX Tools, App UX, App UI, Web UI, Web App UI, B2C, Web UX Design, Style Guides, Rapid Prototyping, Mockups, Mobile UX, Digital Product Design, Product Design, Design Thinking, Wireframing, UI Components, Responsive UI, UX Documentation, UI Libraries, Layout, Interaction Design (IxD), Web Applications, Web & Mobile Applications, Interactive Prototypes, Layout Design, Responsive Web Apps, UX Strategy, UX Wireframes, Responsive Development, Web UI Design, App Design, Prototyping, User Stories
Senior Product Designer
2022 - 2023
Anima
- Designed a Figma plugin that helps developers and designers to automate front-end code directly from the software. The plugin is ranked first in the development category, with over 350,000 installations.
- Drove discussions, research, and study. Created user stories and personas and mapped user journeys. Made presentations, sketches, drafts, designs, components, and assets.
- Improved the user experience by analyzing qualitative and quantitative data and applying it to prototypes and final releases.
- Redesigned the user interface for the plugin and web app while creating and maintaining components for the design system.
Technologies: Figma, React, HTML5, CSS, Front-end, User Research, Web App UX, Plugins, Figma Plugins, User Experience (UX), User Experience Design, User Experience Strategy, UX Tools, App UX, App UI, Web UI, Web App UI, Design Systems, SaaS Design, B2B, Web Design, Responsive Web Design (RWD), Web App Design, Style Guides, Rapid Prototyping, Mockups, Startups, Mobile UX, User Testing, Personas, User Flows, Digital Product Design, Product Design, Design Thinking, Lean Product Development, Wireframing, Lean UX, UI Components, B2C, Responsive UI, User Journeys, User Personas, Business to Business to Consumer (B2B2C), B2B2C, UX Documentation, UI Libraries, Layout, SaaS, Interaction Design (IxD), Web Applications, Web & Mobile Applications, Enterprise Design, Business Technology, Software Design, Customer Journeys, Interactive Prototypes, Layout Design, Component Libraries, Responsive Web Apps, UX Strategy, UX Wireframes, Responsive Development, Sitemaps, User Journey Maps, Web UI Design, UX Design, App Design, UI Design, Prototyping, User Stories, Conversational UX, Conversational Design
Product Designer
2017 - 2022
Booking.com
- Ran hundreds of experiments and A/B testing for user experience optimization of web and mobile apps and eCommerce and internal tools. Created all the designs, prototypes, and scenarios for testing and iterations.
- Designed experiences, pages, tools, and A/B tests for global campaigns like Black Friday and New Year. Created, idealized, organized, and rolled out tools for speeding up the release of campaigns.
- Drove discussions, research, and study. Created user stories and personas. Mapped user journeys and made presentations, sketches, drafts, designs, components, and assets.
- Created, designed, and optimized the user experience of internal tools for partners to manage their properties.
Technologies: A/B Testing, Figma, Photoshop CC, Sketch, InVision, Usertesting.com, Experimental Design, Lean Experiments, UX Research, User Experience (UX), Web UX, Web App UX, UX Tools, Design Systems, Wireframing, Landing Page Design, Responsive Web Design (RWD), Dashboard Design, SaaS Design, B2B, Mobile Design, Web Design, Landing Pages, Mobile, Web App Design, Style Guides, Rapid Prototyping, Mockups, Visual Design, Web App UI, App UX, User Experience Strategy, User Experience Design, Front-end, HTML5, Mobile UX, User Testing, Personas, iOS, Android, eCommerce UX, Mobile UI, App UI, Mobile Apps, Dashboards, Web Dashboards, Web UI, Mobile App Design, User Flows, Digital Product Design, Product Design, Design Thinking, Lean Product Development, iOS UI Design, Hypothesis Testing, Lean UX, eCommerce, eCommerce Design, eCommerce UI, UI Components, B2C, Responsive UI, User Journeys, User Personas, Business to Business to Consumer (B2B2C), B2B2C, UX Documentation, Branding, Conversion Rate Optimization (CRO), Conversion Rate, UI Libraries, Layout, Software as a Service (SaaS), Interaction Design (IxD), Mobile UI Design, Mobile UX Design, Data Visualization, Web Applications, Web & Mobile Applications, Enterprise Design, Business Technology, Software Design, Customer Journeys, Interactive Prototypes, Layout Design, Component Libraries, Responsive Web Apps, UX Strategy, UX Wireframes, Responsive Development, Sitemaps, User Journey Maps, Web UI Design, iOS UX Design, UX Design, App Design, UI Design, Prototyping, User Stories, Conversational UX, Conversational Design
Senior UI/UX Designer
2014 - 2017
Trade Force (now Neogrid)
- Owned the whole design process for the Trade Force web portal and Trade Force field team app, from scratch to release. Some clients who used the product include Unilever, BRF, GSK, Danone, and L'Oréal.
- Realized the competition analysis, user research, user flows and stories, personas definition, wireframes, low-fidelity and high-fidelity prototyping, usability testing, experimentation, and iterations for web and mobile apps.
- Created, idealized, and designed administrative dashboards and systems for retail management.
- Shadowed field users to understand their pain points and iterate on improvements in the mobile app.
- Utilized design thinking and Lean Design methodologies to constantly iterate and improve the products.
Technologies: Sketch, Adobe Illustrator, InVision, Android UI Design, iOS UI Design, Design Systems, HTML, CSS, JavaScript, Startups, Visual Design, Mockups, Rapid Prototyping, Style Guides, Web App Design, Mobile, Mobile First, Dashboard Design, SaaS Design, SaaS, B2B, Mobile Design, Mobile App Design, Geolocation, Web Design, Responsive Web Design (RWD), Landing Page Design, Web App UI, App UX, User Experience Strategy, User Experience Design, Front-end, HTML5, Mobile UX, User Testing, Personas, iOS, Android, Mobile UI, App UI, Mobile Apps, Dashboards, Web Dashboards, Web UI, User Flows, Digital Product Design, Product Design, Design Thinking, Lean Product Development, Wireframing, Hypothesis Testing, Lean UX, UX Tools, Web App UX, Experimental Design, UI Components, Responsive UI, User Journeys, User Personas, B2B2C, Business to Business to Consumer (B2B2C), UX Documentation, UI Libraries, Layout, Enterprise SaaS, Software as a Service (SaaS), Interaction Design (IxD), Mobile UI Design, Mobile UX Design, Data Visualization, Web Applications, Web & Mobile Applications, Enterprise Design, Business Technology, Software Design, Customer Journeys, Interactive Prototypes, Layout Design, Figma, Component Libraries, Responsive Web Apps, UX Strategy, UX Wireframes, Responsive Development, Sitemaps, User Journey Maps, Web UI Design, iOS UX Design, User Experience (UX), UX Design, App Design, UI Design, Prototyping, User Stories
UI/UX Designer
2013 - 2014
Neolog
- Designed a web app for the whole logistics management process, from collection to delivery, reducing travel time and costs.
- Performed heuristic analysis for the old EXE application, drew user flows, created hypotheses, and discussed with stakeholders to validate wireframes.
- Created and coded HTML and CSS for more than 50 screens.
Technologies: UX Design, User Experience (UX), User Interface (UI), UI Design, HTML, CSS, Dashboard Design, SaaS Design, Geolocation, B2B, SaaS, Mobile Design, Web Design, Responsive Web Design (RWD), Mobile, Web App Design, Style Guides, Rapid Prototyping, Mockups, Web App UI, App UX, User Experience Design, Front-end, HTML5, Mobile UX, User Testing, Mobile UI, App UI, Dashboards, Web Dashboards, Web UI, Mobile App Design, User Flows, Digital Product Design, Product Design, Lean Product Development, Wireframing, Design Systems, UX Tools, Web App UX, Responsive UI, User Personas, Layout, Software as a Service (SaaS), Interaction Design (IxD), Mobile UI Design, Mobile UX Design, Data Visualization, Web Applications, Web & Mobile Applications, Enterprise Design, Business Technology, Software Design, Customer Journeys, Interactive Prototypes, Layout Design, Component Libraries, Responsive Web Apps, UX Strategy, UX Wireframes, Responsive Development, Sitemaps, User Journey Maps, Web UI Design, App Design, Prototyping
UI/UX Designer
2011 - 2013
Intuitive Intelligence CRO
- Created hundreds of A/B tests for some of the biggest eCommerce companies from Brazil, such as Fnac, Nova.com, Ponto Frio, and Americanas.
- Designed a web app and dashboard that monitors the eCommerce competition prices and compares the client's product prices in real time.
- Created a mobile app that monitors product inventory at points of sale.
Technologies: Hotjar, A/B Testing, Photoshop CC, HTML, CSS, SaaS Design, B2B, SaaS, Mobile Design, Web Design, Responsive Web Design (RWD), Mobile, Web App Design, Rapid Prototyping, Mockups, Startups, Web App UI, App UX, User Experience Strategy, User Experience Design, Front-end, HTML5, Mobile UX, eCommerce UX, Mobile UI, App UI, Mobile Apps, Web Dashboards, Web UI, Mobile App Design, User Flows, Digital Product Design, Product Design, Wireframing, Lean UX, UX Tools, Web App UX, eCommerce, eCommerce Design, eCommerce UI, UI Components, B2C, Responsive UI, Conversion Rate Optimization (CRO), Conversion Rate, Layout, Interaction Design (IxD), Mobile UI Design, Mobile UX Design, Data Visualization, Web Applications, Web & Mobile Applications, Enterprise Design, Business Technology, Software Design, Interactive Prototypes, Layout Design, Component Libraries, Responsive Web Apps, UX Strategy, UX Wireframes, Responsive Development, Sitemaps, Web UI Design, App Design
UI/UX Designer
2010 - 2011
Freelance
- Managed and oversaw the UX thinking, wireframing, prototyping, and UI design execution.
- Created a system that made it easy for clients to upload photos, add information, and sell and rent their holiday property in the Spanish market.
- Designed and coded several websites for small companies.
- Constructed WordPress themes for clients to update the content on websites easily.
Technologies: Photoshop CC, Illustrator CC, CSS, HTML, Mobile Design, Web Design, Landing Pages, Responsive Web Design (RWD), Mobile, Web App Design, Rapid Prototyping, Mockups, Visual Design, Startups, User Experience Design, Front-end, HTML5, Mobile UI, Mobile Apps, Web UI, Mobile App Design, Product Design, UX Tools, B2C, Layout, Interactive Prototypes, Layout Design, UX Wireframes, Responsive Development, Sitemaps, Web UI Design
Web Designer
2010 - 2010
Doors Agency
- Designed landing pages for Brazilian celebrities in accordance with their sponsors and marketing activities.
- Created hot campaign sites for promotions and marketing purposes for big Brazilian brands.
- Built and coded email marketing campaigns and created templates.
Technologies: Photoshop CC, HTML, CSS, JavaScript, Landing Page Design, Landing Pages, Web Design, Visual Design, Startups, User Experience Design, Front-end, HTML5, Web UI, B2C, Layout, Layout Design
Landing Page Designer and Online Campaign Manager
2008 - 2010
SEO Marketing
- Created, implemented, maintained, and iterated Google AdWords campaigns for small, mid-sized, and big clients.
- Designed and built landing pages for conversion optimization.
- Used heat maps, surveys, hypothesis validation, and data analysis to create iterations for landing pages.
Technologies: A/B Testing, User Experience (UX), HTML, CSS, UI Design, UX Design, Web Analytics, Dashboards, Google AdWords, Landing Pages, Landing Page Design, Visual Design, Startups, User Experience Design, HTML5, Layout Design
Education
2010 - 2011
Master's Degree in Web Applications
Universidad Politecnica de Valencia - Valencia, Spain
2006 - 2010
Bachelor's Degree in Advertising and Marketing
Escola Superior de Propaganda e Marketing - Sao Paulo, Brasil
Experience
Collaboration That Works
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