Guilherme Cerqueira
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Lead Product Designer | Freelancer @ Toptal
São Paulo, Brazil
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Senior Product Designer | Core TeamToptalMay 2026 - Current (6 months)- Senior Product Designer | AI Special ProjectsClipboard HealthAug 2025 - Apr 2026 (9 months)- Led 0-to-1 product development for AI-first caregiving platform focused on workforce management and quality care, including conversational AI interfaces, React Native mobile application, and complete design system from inception - Designed complex user flows for caregiver matching, job browsing, messaging, and ID verification with emphasis on accessibility and scalability - Leveraging Claude Code and AI-assisted design workflows to rapidly iterate on conversational UI, transforming design specifications into production-ready React and React Native components - Integrating design-to-code automation via MCP to streamline testable prototypes and design handoff, reducing iteration cycles and enabling engineers to deploy frontend interfaces fa
- Senior Product Designer | Design SystemsClutchMar 2024 - Apr 2025 (1 year 2 months)- Defined the vision and strategy for a unified design system adopted by multiple cross-functional teams - Positioned the design system as a foundation for scalable product development and brand flexibility - Partnered with engineering and product to replace MUI with a custom React component library, ensuring long-term maintainability - Introduced a token-based theming architecture to support white-label use cases and accessibility standards - Drove alignment across design, product, and engineering through shared principles and governance - Influenced executive and stakeholder buy-in by framing the system’s impact on speed, quality, and scalability - Scaled adoption through clear documentation and self-serve onboarding, reducing design and
- Freelance Product DesignerToptalFeb 2023 - Mar 2024 (1 year 2 months)Enterprise-approved freelancer with active inbound leads and published articles Managing client relationships and delivering high-impact design solutions for B2B and B2C products As a Lead Product Designer for several projects, I provided comprehensive support to international clients across multiple domains of experience design, including design strategy, user research, product innovation, user experience, prototyping, and visual design. Some of the global clients I've helped: Wisdom AI - Collaborated with the CPO to define and design the product's user experience and UI from scratch until MVP launch. Filtered.AI - Collaborated with CEO and CPO to d
- Senior Product DesignerAnimaApr 2022 - Mar 2023 (1 year)Anima leads the design to code space, with over 1M installs on Figma, and a customer base that includes teams from Amazon, Cisco, Samsung, Deloitte, and more. » Owned end-to-end design processes for the #1 design-to-code Figma plugin; » Led design projects across the entire product lifecycle and multiple product launches. » Owned user research processes, created scripts for qualitative research, interviewed users, analyzed user behavior, created scenarios and personas, conducted usability tests to improve the product; » Set the vision for the user experience and created the space for others to collaborate; » Rapidly produced multiple concepts and prototypes; » Updated, maintained and documented the design system; » Supported company in crea
- UX DesignerBooking.comApr 2017 - Apr 2022 (5 years 1 month)- Elevated engagement for Booking.com's B2B Promotion Center by optimizing user experience, transitioning from 10,000 to 1,600,000 users through strategic product design. - Optimized the UX of impactful products, such as Deal of the Day and Free Nights Promotions, via A/B testing and experimentation. - Leveraged the integration of machine learning techniques and algorithms to optimize deal selection and deliver personalized customer experiences. - Successfully orchestrated the first and subsequent Black Friday campaigns at the company, contributing to the triumph of seasonal promotions. - Idealized and took the initiative of the design and implementa
- Head of DesignNeogridApr 2014 - Apr 2017 (3 years 1 month)» Owned end-to-end design process for web portal and mobile app, including: competition analysis, user research, user flows & stories, persona creation, wireframing, prototyping, UI Design, usability testing, experimentation; » 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. » Prototyped low-fidelity and high-fidelity mockups; » Front-end development using HTML5, CSS3 (SASS & Stylus), JavaScript, jQuery, Bootstrap 3; » Handled full cycle UI/UX Design and front-end assignments, from briefs to
- UX Designer & Front-End DeveloperPakua ITOct 2011 - Mar 2014 (2 years 6 months)» Web Design and Front-End Development for corporate websites using Adobe Photoshop, Adobe Illustrator, Sketch, HTML5, CSS3 and jQuery - design focuses on being fully responsive to work across all devices and browsers; » User Interface Design and Front-End Development for web and mobile corporative apps (Android and Web) - focus on usability and user experience; » A/B testing and design for e-Commerces, with total focus on conversion and sales increase, based on heat maps, user behaviour and business metrics. » Started Trade Force project, which later became a company of its own. Some clients: Grupo Nova Pontocom (Ponto Frio, Extra and Casas Bahia), Shoptime, Le Postiche, Vivo, AutoParts Online, Pitzi, Internet Innovation, Shoestock, Di San
- UX Designer & Front-End DeveloperFreelancerJun 2010 - Oct 2011 (1 year 5 months)As I went to study abroad in Spain to learn the language and get my Master's degree, I kept working as a Freelancer. Delivered several projects for both Brazilian and Spanish clients. » Created websites for clients that often used WordPress as a content management system. » Heavy use of Twitter Bootstrap for responsive design purposes. » Frequent usage of jQuery to make sites interactive and responsive to user input. » Front-end development (HTML5, CSS3 and jQuery) » Design focused on being fully responsive to work across all devices and browsers. » Adobe Photoshop used to create/edit images and icons.
- AWeb DesignerAgência DoorsFeb 2010 - May 2010 (4 months)» 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.
- Landing Page Designer & Google Adwords Account ManagerSEO Marketing BrasilSep 2008 - Feb 2010 (1 year 6 months)» Creation, implementation, maintenance and maximization of Google Adwords campaign results, for small, mid-sized and big clients; » Landing pages design and development; » Website traffic and reports analysis; » Google Analytics Goals evaluation; » A/B testing in Landing Pages for conversion rate optimization; » Website optimizations as per the SEO guidelines.
- RWeb Designer / WebmasterRaidho TurismoMay 2008 - Aug 2008 (4 months)
- Web DesignerGodirectSep 2007 - Apr 2008 (8 months)
Education
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- master, Master, Aplicaciones WebUniversitat Politècnica de València (UPV)Jan 2010 - Jan 2011 (1 year 1 month)
- bachelor, Bacharel, Comunicação Social com habilitação em Publicidade e MarketingESPMJan 2006 - Jan 2010 (4 years 1 month)