Sérgio Estrella, Designer in São Paulo - State of São Paulo, Brazil
Sérgio Estrella

Designer in São Paulo - State of São Paulo, Brazil

Member since February 1, 2017
Sérgio is a UI/UX designer with more than a decade of experience. As an expert in designing interfaces and shaping experiences, he's worked with small and large teams in different fields, such as education, enterprise, pets, sports, entertainment, and automobile. Sérgio is a technology and games enthusiast interested in how people interact with the digital world and how it changes over time.
Sérgio is now available for hire


Digital Design


  • UI/UX Designer

    2017 - PRESENT
    Clients (via Toptal)
    • Designed a location-based mobile app for renting bikes on the go, with a gesture-based unlock system that helped avoid accidental interactions and engage users.
    • Redesigned the landing page of an aerospace and defense company that wanted to reinvigorate their online presence and optimize the user access of product catalogs and specifications.
    • Worked on the design and user experience of a social network mobile app that offered a unique take on sharing food pictures, recipes, nutrition, and restaurant reviews, with a minimalistic design and fast navigation.
    • Crafted a web dashboard and scheduling tool for a human resources company that had a lot of information spread, and needed an efficient solution to speed up decision-making over different branches.
    • Designed the UI/UX of a mobile health app for pets, including vaccine management, appointment calendar and a contact list for doctors and groomers.
    • Worked on an educational web app and dashboard to manage attendance in schools, with a focus on interaction design to turn the process of filling up forms by the teachers into faster and more satisfactory activities.
    • Designed the UI of a learning platform and web game that teaches kids how to write code and understand programming logic, for a specialized IT school.
    • Crafted the visual identity, web and mobile layout of a gaming news website, also including digital magazines, online communities and social media resources.
    Technologies: InVision, Adobe Illustrator, Adobe Experience Design (XD), Sketch, User Experience (UX)
  • UI/UX Designer

    2017 - 2020
    Kalon Creative
    • Created a design for a web app to manage volunteers at events for non-profit organizations, with scheduling, calendar, courses, and event landing pages that increased engagement.
    • Designed a web-based team management platform with tasks, activities, forms, dashboards and data visualization. It included a landing page with conversion rate optimization that brought more users.
    • Worked on the user experience of an accountability platform to track user access across the internet over desktop and mobile. The tool included dashboards, analytics, and family group features with an accessible UI.
    • Crafted a landing page design for a humanitarian organization against human trafficking across the globe—with a focus on conversion rate optimization for donations and support on social media.
    • Designed an eCommerce platform for customizable products based on pictures uploaded by the users, focusing on a streamlined checkout experience to improve conversion.
    • Worked on the UI/UX of a design-centric collaborative project management tool that included data gathering, questionaries, inspiration boards and activity feeds. Time and communication gains were crucial for different types of design projects.
    • Designed a landing page for healthcare missions. The content structure was optimized to guide users on finding resources, organizations to serve with, and attend to related events.
    Technologies: Adobe Experience Design (XD), Abstracts, InVision, Sketch, User Experience (UX)

Other Experience


  • Post Graduation Certificate in Design and Digital Technology for Products and Services
    2010 - 2012
    Fundacao Armando Alvares Penteado | FAAP - São Paulo, Brazil
  • Bachelor's Degree in Graphic Design
    2006 - 2010
    Federal University of Paraná | UFPR - Curitiba, Brazil



São Paulo - State of São Paulo, Brazil

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