Sérgio Estrella
UX/UI Designer
Barcelona, Spain
+17754550960
be.net/sergioestrella
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.
Work Experience
Toptal
UI/UX Designer
Design, prototyping, and usability for web and mobile apps. Working with multiple international clients to provide high-quality products for users and organizations.
Technologies used: Sketch, Adobe XD, Adobe Illustrator, InVision, Abstract.
Technologies used: Sketch, Adobe XD, Adobe Illustrator, InVision, Abstract.
August 2017
- Present
São Paulo, United States
Kron Digital
Lead UI/UX Designer
Research, prototyping, and design for mobile apps and cross-platform solutions. I worked with the clients to understand their needs and pains—bringing emphatic solutions.
- Developed the UX and UI for the new version of an invoice analytics app (the client was a beer company).
- Designed a new app for enabling food rescue in the city of São Paulo.
- Created a customizable app for internal approvals. The app is customizable to the branding and color choices of each individual client.
- Designed an app concept for pet care and management.
Technologies: Adobe XD, Photoshop, Illustrator, JIRA, Slack, Kony
- Developed the UX and UI for the new version of an invoice analytics app (the client was a beer company).
- Designed a new app for enabling food rescue in the city of São Paulo.
- Created a customizable app for internal approvals. The app is customizable to the branding and color choices of each individual client.
- Designed an app concept for pet care and management.
Technologies: Adobe XD, Photoshop, Illustrator, JIRA, Slack, Kony
March 2017
- February 2018
Brazil
Iterative
UX/UI Designer & Front End Developer
Design, prototyping and development of web and mobile apps. My job was to create delightful and easy to use experiences for the users, understanding their needs and problems, then ensuring the access by a wide range of devices with the client-side development.
ConectCar: uses an Automatic Vehicle Identification (AVI) technology that allows it to be automatically recognized in tolls. For this client, I prototyped, created and implemented layouts and user flows in the client, partner, operational, mobile and institutional environment.
Accentiv' Mimética: agency that integrates relationship and marketing solutions. For this client, I implemented layouts and did bug fixing for their incentive campaign platform.
Vivo Zuum: a digital bank account service integrated with another services, like the public transport system. For this client, I created, implemented layouts, and turned static layouts into responsive ones in institutional environment and B2B.
Technologies used: HTML5, CSS3, JavaScript, Bootstrap, Foundation, JQuery, NodeJS, Less, Visual Studio, Sublime, Photoshop, Illustrator, Fireworks, Dreamweaver, Axure.
ConectCar: uses an Automatic Vehicle Identification (AVI) technology that allows it to be automatically recognized in tolls. For this client, I prototyped, created and implemented layouts and user flows in the client, partner, operational, mobile and institutional environment.
Accentiv' Mimética: agency that integrates relationship and marketing solutions. For this client, I implemented layouts and did bug fixing for their incentive campaign platform.
Vivo Zuum: a digital bank account service integrated with another services, like the public transport system. For this client, I created, implemented layouts, and turned static layouts into responsive ones in institutional environment and B2B.
Technologies used: HTML5, CSS3, JavaScript, Bootstrap, Foundation, JQuery, NodeJS, Less, Visual Studio, Sublime, Photoshop, Illustrator, Fireworks, Dreamweaver, Axure.
March 2015
- November 2016
São Paulo, Brazil
Geekverse
UX/UI Designer & Front End Developer
Design and implementation of layout for an e-commerce focused on “geek” customers, CMS maintenance, email marketing and advertising placement.
Technologies used: HTML5, CSS3, JavaScript, JQuery, CMS (Iluria, Loja Integrada), Photoshop, Illustrator, Fireworks, Dreamweaver, MailChimp.
Technologies used: HTML5, CSS3, JavaScript, JQuery, CMS (Iluria, Loja Integrada), Photoshop, Illustrator, Fireworks, Dreamweaver, MailChimp.
January 2014
- February 2015
São Paulo, Brazil
Tambor Digital
Graphic Designer & Advertising Manager
Design and management of advertising campaigns, complete with static and animated artworks, e-mail marketing. Design and development of campaign hotsites.
Technologies used: HTML5, CSS3, JavaScript, JQuery, PHP, Magento, Joomla, WordPress, Photoshop, Illustrator, Fireworks, Flash.
Technologies used: HTML5, CSS3, JavaScript, JQuery, PHP, Magento, Joomla, WordPress, Photoshop, Illustrator, Fireworks, Flash.
October 2012
- April 2013
São Paulo, Brazil
Brosz
Head of Design & Front End Developer
Content management, advertising and social media. As a Head of Design, I coordinated the design team, improve the design consistence across the products and campaigns. Maintenance and constant site changes and improvements.
Technologies used: HTML5, CSS3, PrestaShop, Photoshop, Illustrator, Fireworks.
Technologies used: HTML5, CSS3, PrestaShop, Photoshop, Illustrator, Fireworks.
November 2010
- September 2012
São Paulo, Brazil
UFPR
Web Designer
Development and management of the UFPR Design Department website.
April 2009
- April 2010
Curitiba, Brazil
Digital House
Graphic Designer
Branding and graphic design for print and web. Photo editing and restoring.
December 2004
- March 2006
Santa Fé do Sul, Brazil
Education
FAAP
Design and Digital Technology for Products and Services
August 2010
- November 2012
São Paulo, Brazil
Languages
Portuguese (Native),
English (Fluent),
Spanish (Fluent),
Skills
Adobe XD,
Analytics ,
Bootstrap,
CSS3,
Front-end,
HTML5,
Illustrator,
Indesign,
InVision,
Photoshop,
SEO,
Sketch,
Social Media,
UI Design ,
UX Design,
UX/UI Design,
WordPress,