My name is Sergio, I'm a 32 year old developer from Buenos Aires. In 2012 I started working in web development and found my passion building great user experiences. My area of expertise is frontend and building clean, efficient, scalable, and responsive UI are my strengths. My work history covers a wide range of fields, from advertisement to AI. I've built sites and apps for brands like Nike and Samsung, mobile video games, medical products, SaaS companies, and I'm working for an online retail company in Argentina, MercadoLibre. For the last 6 years, my work is part of the migrating processes from old stacks to modern implementations with React. Along the road, I've used several technologies such as NextJs, Redux, Node, and also several implementations of CSS in JS, like Styled Components, CSS Components. I also have experience working and integrating services like Contentful, HubSpot, Mailchimp, Sendgrid, etc. What do I know? HTML5, CSS3. React. NextJS. Styled Components. CSS Preprocessors (SASS, LESS). Responsive Web Design. UX/UI. Source control management tools (Git, Mercurial). Experience working with Node environment. Javascript task runner (Grunt, Gulp). Experience working with frameworks like Backbone, Angular, React. Experience with CMS (Wordpress, Drupal). Knowledge with PHP and MySQL. Experience in C# and .NET environments. Working knowledge with cloud hosting services (Digital Ocean, AWS). Experience with Linux based environments.