Sérgio Estrella

UX/UI Designer

Barcelona, Spain
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.
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
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.
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.
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.
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.
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

Universidade Federal Do Paraná

Graphic Design

March 2006 - June 2010 Curitiba, 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,