Sérgio Estrella
Verified Expert in Design
Designer
São Paulo - State of São Paulo, Brazil
Toptal member since February 1, 2017
Sérgio is a UI/UX designer with over 15 years of experience crafting intuitive interfaces across diverse industries, including AI, enterprise, finance, education, eCommerce, and automotive. His background in graphic design, front-end development, and team leadership ensures a comprehensive approach to user-centered solutions. As a tech enthusiast and digital nomad with experience in 50+ countries, Sérgio brings a unique global perspective to his design approach.
Portfolio
Social Sharing Food App
EduX Classes Reporting | UX and Interaction Design
Geekverse | Visual Identity and UX Design
Work Experience
UI/UX Designer
Clients (via Toptal)
- Developed the rebranded version of an AI assistant that organizes users' emails and personal information, integrates them into their previous inbox, and offers a chatbot and smart features to speed up frequent tasks.
- 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 its online presence and optimize user access to product catalogs and specifications.
- Handled 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 app solution for human resources and taxes, allowing users to manage their employees, clients, payrolls, time tracking, calendars, and more, with a modern and easy-to-use interface.
- Designed the UI/UX of a mobile health app for pets, including vaccine management, an 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 an eCommerce's visual identity and website focused on gaming and entertainment, including marketing resources for social media, advertisement, and email newsletters.
UI/UX Designer
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.
- Handled 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.
- Contributed to 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.
UX/UI Designer
Kron Digital
- Designed a mobile companion app for FIAT, bringing social elements, gamification and location data to the company's car users.
- Redesigned an invoice analytics mobile app for AB InBev with location-based data visualizations.
- Designed the UI and identity of a location-based, mobile-and-web app for a food rescue and delivery service in the city of Sao Paulo, Brazil.
- Designed a customizable B2B mobile app for internal SAP approvals.
- Designed the UI and visual identity of an end-user mobile app for pet care and management.
- Developed a mobile app design for a gas company with chatbot UI and credit/spending management.
- Designed the UI and branding of a mobile app for sports fans with news, quizzes, score predictions, and gamification elements.
- Crafted the design for a support ticket management mobile app with a strong focus on information hierarchy.
- Created the company's presentation designs for clients and teams. Managed and designed email marketing and social media campaigns. Maintained the company's brand presence on the web.
UX/UI Designer | Front-end Developer
Iterative
- Designed and implemented the landing pages, administrative environment, and new features of the mobile app for ConnectCar: an automatic toll payment company.
- Developed and designed the layouts for a web campaign builder platform for Accentiv' Mimética: an agency that integrates relationship and marketing solutions.
- Designed and implemented the landing pages and B2B environment for Vivo Zuum: a digital bank service.
UX/UI Designer | Front-end Developer
Geekverse
- Established the branding and designed the print materials for Geekverse: an eCommerce focused on games, comics, and action figures.
- Designed and implemented the eCommerce layout and maintained the CMS platform.
- Managed and designed the email marketing campaigns, social media engagement posts, and advertising.
- Created the designs for the company's presentations to partners and product suppliers.
Graphic Designer | Web Designer
Tambor Digital
- Designed and managed advertising campaigns with banners and email marketing for companies like Carrefour, SEGA and Microsoft.
- Designed and implemented campaigns landing pages for companies like Sony and Sennheiser.
- Created content for gaming news websites and magazines.
Graphic Designer | Web Designer
Brosz
- Designed the visual identity, website, email marketing, and social media for a gaming eCommerce.
- Handled the branding, web layout, email campaigns, and social media for an eCommerce focused on imported products.
- Coordinated the design team workflow and improved the design consistency across products and advertising campaigns.
- Managed the eCommerce's CMS platform (PrestaShop).
Web Designer
Federal University of Paraná (UFPR)
- Developed the Federal University of Paraná (UFPR) Design Department website.
- Managed the Federal University of Paraná (UFPR) Design Department website.
- Updated the Federal University of Paraná (UFPR) Design Department website.
Graphic Designer
Digital House
- Defined the visual identity and designed print materials like business cards for a wide range of clients.
- Created personalized DVD covers and frames for photoshoots.
- Edited studio photos and restored old pictures from clients.
Education
Post Graduation Certificate in Design and Digital Technology for Products and Services
Fundacao Armando Alvares Penteado | FAAP - São Paulo, Brazil
Bachelor's Degree in Graphic Design
Federal University of Paraná | UFPR - Curitiba, Brazil
Skills
Tools
PrestaShop, Fireworks, Adobe Experience Design (XD), InVision, Sketch, Adobe Photoshop, Adobe Illustrator, Adobe InDesign, ProtoPie, InDesign CC, Framer Prototyping, Oxygen, Adobe Creative Suite, Photo Editors, Microsoft PowerPoint, Canva, Banner, Wix, Figma Prototyping, Blender, Flash, Adobe Dreamweaver, Mailchimp, Visual Studio, TFS, Sublime Text, Jira
Languages
HTML5, CSS3, HTML, CSS, JavaScript, PHP, Less, Charity
Platforms
Figma, WordPress, iOS, Shopify, Web, Android, Mobile, WooCommerce, Apple, Webflow, Adobe Suite, Salesforce, iGaming, Google Ads, Desktop, Magento, Joomla, Axure
Industry Expertise
Education, Retail & Wholesale, Psychology & Mental Health, Education Technology (Edtech), Consumer Products, Events, Building & Construction, Professional Services, Real Estate, Logistics, Social Networking, Banking & Finance, Entertainment & Leisure, Automotive, Health & Wellness, Hospitality, Creative Tech, Advertising, Marketing, Restaurants & Dining, Exercise & Fitness, Fitness, Sales & Marketing, Investments, Travel & Leisure, Technology, Media, Fashion, Fashion & Beauty, Luxury Goods, Transportation & Shipping, Food & Beverage
Other
UI Design, UX Design, Product Design, Mobile Design, eCommerce, Design Systems, Content Management Systems (CMS), B2B, eCommerce UI, eCommerce UX, eCommerce Web Design, Brand Design, Web App UX, Web App UI, Web App Design, Web Applications, Mobile Applications, Mobile Apps, Logo Design, Presentation Design, Responsive Web Apps, UI Prototyping, Gamification, Information Architecture (IA), Maps, Location Services, Pets, Apps, Animal Care, Veterinary Medicine, Management, Invoices, Data Visualization, Mobile UX, SAP, Order Management, Budget Management, Toys & Children's Products, Social Media Marketing (SMM), Email Marketing, Education Management Systems, Time Management, School, Responsive Design, Landing Pages, Lead Generation, Volunteering, Sales, Team Management, Forms, Dashboards, Charts, Driving, Cars, Responsive Web Design (RWD), Branding, Mobile UI, Wireframing, Prototyping, Graphic Design, Web Design, Interaction Design (IxD), User Experience (UX), User Interface (UI), App Design, Layout Design, UX Wireframes, Visual Design, User Journeys, Artificial Intelligence (AI), User Experience Design, User Flows, Style Guides, User Research, Data Analytics, Dashboard Design, Mobile App Design, Social Media, Landing Page Design, Landing Page Optimization, Conversion, Annotated Wireframes, UI Components, SaaS Design, Best Practices in Design, MVP Design, Web UX, Web UI, Websites, Illustration, Color Schemes, Elementor, Web Usability, Mobile eCommerce, Web UX Design, Direct to Consumer (D2C), High-fidelity Prototypes, Mockups, UX Audits, Website Audits, B2C, Heuristics, Checkout, Heuristic Analysis, UX Branding, Dark UIs, Design, UX Scenarios, Lean Startups, Product Strategy, Journey Mapping, Rapid Prototyping, Admin Panels, Design Leadership, Presentations, Cross-functional Collaboration, Agile, Competitor Analysis & Profiling, Mobile-first Design, UI Animation, User Onboarding, Edtech Design, Corporate Websites, AI Design, Chatbots, Generative Design, User Interviews, Native Mobile Apps, Blog Design, UI Branding, Brand Guidelines, Marketplaces, Competitive Analysis, Strategic Planning, Mobile UI Design, Mobile UX Design, Marketing Design, Search Engine Optimization (SEO), User Personas, Business Intelligence (BI), Software as a Service (SaaS), WordPress Design, Augmented Reality (AR), Microinteractions, Microinteraction Design, Motion Design, Envisioning, Interactive Prototypes, Marketplace Design, Web UI Design, Pitch Decks, Social Media Design, ChatGPT, Visual Storytelling, Voice Interface, User Journey Maps, User Testing, OpenAI, Artificial Intelligence as a Service (AIaaS), Generative Artificial Intelligence (GenAI), Enterprise SaaS, Enterprise, Icon Design, Icon Sets, Banner Ads, Product Detail Pages, Microcopy, Color Palettes, Typography, Learning Management Systems (LMS), Digital Innovation, Value Innovation, No-code Development, Print Design, Color Theory, User-centered Design (UCD), Accessibility, Heuristic Evaluation, Low-fidelity Prototypes, Mobile Prototypes, Mobile App UI, High-fidelity Mockups, Fluid UI, Design Thinking, Business Technology, Vectors, Squarespace, Conversational UX, Mobile First, Product Discovery, Subscriptions, Premium Content Subscriptions, Project Management, White Label Design, Conversion Rate, Lottie, Midjourney, Motion Graphics, Transportation & Logistics, Search Engines, Stock Photos, WYSIWYG Web Builders, Website Builders, Form Design, Service Design, System Design, Data-heavy Design, Complex Web Systems, SaaS, Billing Software, Customer Relationship Management (CRM), CRM Design, Voice User Interfaces (VUI), Framer, Conversion Rate Optimization (CRO), Art Direction, Animation, React Native, P2P, Shopping Carts, Social Networks, Banner Design, Brochures, Email Campaigns, Packaging, Stationery Design, Image Retouching, UI Guidelines, Content Design, Optimization, Email Design, HubSpot, Infographics, Gaming, Display Advertising, Social Media Advertising, Video Editing, Videos, PowerPoint Design, Motion & Animation Design, Ads, Agency, Marketing Strategy, Marketing Collateral Development, Logotype, eCommerce Design, Device Interaction, Touch Interactions, Widgets, Tailwind CSS, Enterprise Resource Planning (ERP), Content Marketing Platforms, Travel Design, Business to Business (B2B), A/B Testing, Sitemaps, Conceptual Design, Low-fidelity Mockups, UX Principles, Concepting, Consumer Electronics, Industrial Design, Demos, Design Guidelines, Sales Presentations, Storytelling, Templates, Brand Logos, Social Media Covers, Newsletters, Workshops, UI Motion, Blogs, Usability Testing, Enterprise Application Design, Crypto, Web3, Virtual Reality (VR), Virtual Reality App Design, Design Principles, Desktop Web Design, Automation, Voice UI Design, Tablet Design, Market Research, Brand Books, Conversational Interfaces, B2B2C, Complex Application User Interfaces (UI), Leadership, AI-enabled Applications, Design Reviews, Research, Books, Game Design, Non-fungible Tokens (NFT), Agriculture, Travel, Click-through Rates (CTR), Material UI, Blockchain, Animated Prototypes, AI Content Creation, Communication Strategy, Front-end, Wix Studio, Web Application Design, Educational Platform Design, Design Consultation, Notion, Marketing Materials, B2B Lead Generation, Digital Marketing Design, Paid Advertising, Startups, UX Prototyping, Testing, Text to Image AI, Image Generation, Website Design, User Stories, Stakeholder Interviews, Design Workshops, UX Strategy, UX Research, Component Libraries, Audits, UI Audits, User Validation, Front-end Design, Fintech, Web Development, 3D Design, Abstracts, Website CMS, jQuery, Bootstrap, Node.js, Bike Rentals, Embedded Systems, Social Media Apps, Social Sharing, Sharing Economy, iOS App Design, Android UI Design, Android Design Guidelines, App UI, App UX, Meal Delivery Services, Aviation, Aerospace & Defense, React, Chrome Extensions, Chatbot Conversation Design, Machine Learning, Comics
Experience
- User Interface (UI) - 15 years
- Web Design - 15 years
- Adobe Illustrator - 15 years
- Adobe Photoshop - 15 years
- Product Design - 10 years
- User Experience (UX) - 10 years
- Figma - 5 years
- Sketch - 5 years
Tools
- Sketch
- Adobe Photoshop
- Adobe Illustrator
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