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Javier L.

Senior Software Engineer

Cochabamba, Bolivia

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About Me

Javier is a Senior Front-end Developer who delivers high-quality services writing clean code and using a combination of technologies like Next.js, React.js, Node.js, JavaScript, and TypeScript. He is committed to offering value while enhancing his software craftsmanship to better serve clients. Javier also specializes in HTML5, CSS3, Ember.js, Angular 1, API manipulation, cross-browser compatibility, QA, and web animation.

JavaScript 7 years React.js 4 years Redux 3 years Typescript 2 years AWS 2 years Node.js 3 years Web Development 7 years Ember.js 3 years Sitecore 3 years MySQL 7 years Electron.JS 2 years React Native 2 years

Work history

UpStack

Senior Front-end Developer

2022 - Present (3 years)

Remote

Creating and developing innovative software solutions for clients across a broad range of industries.
Participating in scrums consisting of cross-functional teams, both software and hardware.
Ensuring that features are being delivered efficiently and on time.

React.js Redux JavaScript Typescript AWS Node.js Web Development MySQL

Freelance

Front-end Web Developer

2022 - 2022

Remote

Developed an evergreen React/Next.js/Node.js project where performance and technical debt were tackled head on.
Performed visual and E2E testing using Cypress, Vercel, Storybook, and BrowserStack Percy.
Worked on multiple DevOps duties using Sanity datasets and others.

React.js Next.js Node.js Cypress Vercel Storybook DevOps MySQL E2E Testing BrowserStack Sanity.io

BairesDev

Front-end Web Developer

2018 - 2022 (4 years)

Remote

Developed a project that uses React.js and Next.js on the front end and related technologies such as Redux, Redux Toolkit, Redux-Saga, and React UI component libraries.
Created several third-party analytics scripts and event tracking using a unifying framework called Tealium.
Implemented cookie consent management and interframe message communications API and turned web designs into front-end layouts for desktop and mobile viewports for the marketing team of a cybersecurity company.

JavaScript React.js Next.js Redux Redux-Saga Redux Toolkit UI Components APIs MySQLTealium

Freelance

Front-end Developer

2015 - 2017 (2 years)

Remote

Implemented front-end web components and code using Sitecore, Ember.js, and charting libraries (Plotly.js, Highcharts).
Interacted with NoSQL, MongoDB, and in-browser data stores and RDBMS such as MySQL and MS SQL.
Developed mobile solutions and desktop apps using React Native and Electron.js.

JavaScript Web Development Ember.js Sitecore Plotly High Charts MongoDB MySQL MSSQL React Native Electron.JS noSQL

Portfolio

React.js Developer - Sellry New eCommerce Platform

Sellry is a platform for growing high-conversion eCommerce sites and apps. Implemented eCommerce features and bug fixes on a Next.js-based project. Used Emotion styled-components and performed unit and E2E testing using Storybook, Cypress, React Testing Library, GraphQL, and Sanity datasets.

Front-end Developer - FP Marketing Website & Analytics

Implemented web, desktop, and mobile designs using jQuery and JavaScript to integrate tracking pixels for analytics. Managed the Tealium IQ platform and a variety of tracking scripts.

React.js Developer - CE

This was an internal company project. Worked as a React developer on a project based on React/Redux Saga on top of a Next.js setup using Reactstrap UI components and consuming APIs from a ClickHouse back-end setup.