Luiz Sócrate, JavaScript Developer in Stockholm, Sweden
Luiz Sócrate

JavaScript Developer in Stockholm, Sweden

Member since January 15, 2015
Luiz is a full-stack developer with years of experience working as a consultant for big clients and on intense projects. He has an academic background in both chemistry and graphic design. He approaches the scientific method seriously and takes on a pragmatic approach when working with clients.
Luiz is now available for hire




Stockholm, Sweden



Preferred Environment

Chrome, Git, Tmux, Neovim, Arch Linux

The most amazing...

...thing I've accomplished is to turn the system of one of the top eCommerce sites in Latin America into a system capable of running completely independent stores.


  • Researcher and Developer

    2014 - PRESENT
    Envisioning Technology
    • Created a RESTful API with I18n support for interacting with a graph database on emergent technologies.
    • Researched methodologies for comparison of emergent technologies in relation to their development progress.
    Technologies: Mocha, Neo4j, Express.js, Node.js, JavaScript
  • Node.js Developer

    2017 - 2017
    OverUnder (via Toptal)
    • Restructured the database for better performance.
    • Implemented custom functions and triggers on the database.
    • Developed RESTFul API endpoints.
    • Developed service workers and background processes for data scraping.
    • Developed libraries to handle PostgreSQL table inheritance logic on Node.js.
    Technologies: Express.js, PostgreSQL, Node.js
  • PHP/Zend back-end Developer

    2016 - 2017
    Wordi (via Toptal)
    • Migrated a PHP app to Node.js using Loopback.
    • Extended Loopback connectors to be able to handle complex collation logic.
    • Implemented web sockets for notifications.
    • Implemented peer to peer audio communication via web sockets.
    • Developed and integrated audio processing to clean up audio uploaded by users.
    • Extended the default filtering methods of Loopback to accept custom values.
    • Integrated Solr with MysQL to better handle large volumes of data.
    • Developed application caching using Redis.
    Technologies: Solr, SOX, Redis, Socket.IO, MySQL, Loopback, Node.js, PHP
  • Ember.js User Experience Artisan

    2015 - 2016
    Travelbank (via Toptal)
    • Created abstractions to handle Cordova integration.
    • Developed a custom store for a hybrid approach between local storage and API requests.
    • Heavily refactored many parts of the app.
    • Improved test coverage.
    • Migrated the app from CoffeeScript to ECMAScript 6.
    • Extended the loopback API.
    • Helped to flesh out the UX.
    Technologies: Sass, CoffeeScript, ECMAScript (ES6), Cordova, Node.js, Ember.js
  • Ember.js Expert

    2015 - 2015
    Leapset (via Toptal)
    • Developed multiple Ember CLI add-ons.
    • Implemented custom API endpoints on a Node.js Sails application.
    • Developed scripts for filtering, validation, and importing of data from non-trivial XLS files.
    • Reorganized the Ember.js project structure to better integrate with newer versions of dependencies.
    • Coached team members on Ember.js best practices and future developments.
    • Improved test coverage of Ember.js projects.
    Technologies: Bootstrap, MongoDB, Sails.js, Node.js, Ember.js
  • Full-stack Developer

    2015 - 2015
    School Family Media (via Toptal)
    • Fixed bugs on the application sign-up flow.
    • Redesigned the UI of a Backbone.js/Marionette.js application.
    • Implemented new features on a Backbone.js/Marionette.js application.
    Technologies: CSS, Marionette.js, Backbone.js, JavaScript, MySQL, CakePHP, PHP
  • Lead Developer

    2014 - 2015
    • Led a small team on the development of a single-page application for human resource management using Ember.js.
    • Assigned priorities to development tasks.
    • Created various Ember.js custom components.
    • Developed part of an API with Express.js and MongoDB. Included tests with Mocha.
    • Configured continuous integration for an application using Travis CI.
    • Instructed new developers on working with Ember.js.
    • Presented a workshop introducing Ember.js.
    Technologies: Bootstrap, Stylus, Mocha, Emblem, D3.js, Ember.js, MongoDB, Node.js, JavaScript
  • Web Developer

    2014 - 2014
    Núcleo Digital
    • Extended Python CKAN, customizing it to the needs of the government of the City of São Paulo as the central aggregation of municipal data.
    • Developed custom CKAN templates.
    • Developed custom WordPress themes and plugins.
    Technologies: Sass, Stylus, CSS, Jekyll, MySQL, CKAN, Python, WordPress, PHP
  • Front-end Software Developer

    2013 - 2014
    • Developed a single-page application using Ember.js that powered the interface for a buyer's club, involving interfacing with various partner APIs.
    • Designed and developed a single-page application using Ember.js and D3.js to allow administrative tasks and custom business intelligence reports to be extracted and visualized from another application.
    Technologies: Bootstrap, Sass, D3.js, Ember.js, Node.js, JavaScript
  • Back-end Software Developer

    2013 - 2013
    Natura (via Concrete Solutions)
    • Developed a PHP adapter for the Java TinCan library.
    • Implemented Drupal modules for e-learning.
    • Implemented Drupal custom themes.
    Technologies: MySQL, Drupal, PHP, Less
  • Lead Developer

    2012 - 2012
    Locaweb (via Concrete Solutions)
    • Handled the transition of projects from third-party developers to in-house developers.
    • Integrated a custom authentication platform.
    • Developed administration panels for a CMS.
    • Handled project migration from SVN to Git.
    • Implemented a custom theme system on top of WordPress.
    Technologies: Git, Subversion (SVN), Sass, JavaScript, MySQL, WordPress, PHP
  • Software Developer

    2011 - 2012
    Dafiti (via Concrete Solutions)
    • Implemented improvements on validation and data display for store checkout.
    • Improved and refactored the store templating system to allow whitelabel stores. Implemented administration of the new templating system and its caching system.
    • Architected and implemented a private RESTful API to serve mobile applications.
    Technologies: Ext JS, jQuery, Memcached, Redis, MySQL, Yii, Zend Framework, JavaScript, PHP
  • Software Engineer

    2011 - 2011
    Delta X
    • Developed an integration flow for the welcoming process for sellers from the sixth largest direct sales company in the world.
    • Developed a system responsible for handling the logistics of tracking one of the largest delivery operators in Brazil.
    • Handled performance optimization for a series of process reports using PostgreSQL.
    • Optimized processes for the printing of delivery packages.
    • Developed custom reports for the marketing department.
    Technologies: MySQL, PostgreSQL, PHP, Perl
  • Web Developer

    2010 - 2011
    New Content
    • Designed and developed a platform for advertising tweets by celebrities, allowing bidding on campaigns, scheduling of tweet publications, tracking of clicks and handling of payments. Developed algorithms to determine the reach of each Tweet and celebrity.
    • Developed both the back-end and front-end of a CMS for highly interactive magazines and the accompanying APIs.
    • Integrated Google Maps with various custom functions as the main navigation into a tourism portal.
    • Created a system to allow readers of a tourism portal to create a schedule for their trips and be able to save it without requiring any logins.
    • Assisted another team in migrating an application from PHP to .NET.
    Technologies: CSS, jQuery, JavaScript, HTML, WordPress, CakePHP, MySQL, PHP


  • Gestor8

    I led the development team of Gestor8 and was the responsible for its architecture. Gestor8 is a complete human resources management SaaS, developed as a single-page application made using Ember.js and Node.js.

  • DFTStores

    DFTStores is the white-label SaaS version of Dafiti's own store that can be provided for third parties. I was part of the team that developed this feature into the eCommerce platform, which was quite complex, since this feature was absolutely unexpected in the application architecture. To implement this, the whole system had to be modified, from interface rendering and administration to storage and caching. This turned the system from a simple, unique one into an open platform. I was responsible for the implementation of the new interface rendering engine (and its caching) and the administration sections.

  • Professional Training

    Getting and Cleaning Data (2015), R Programming (2015), both offered via Johns Hopkins University and implemented on Coursera's MOOC platform.

    Model Thinking (2013) offered via the University of Michigan, Ann Arbor and implemented on Coursera's MOOC platform.

  • Travelbank App

    Travelbank is an App for iOS and Android, developed using Ember.js and Cordova. The app tracks travel expenses for corporate travelers, handles budgeting and budget suggestions, generates reports, and has the tools to allow managers to control budgets and refund expenses. I did extensive work in this app's client, working on budget suggestions, expense entries, reports, and many other features.

  • Toptal Mentor
    Luiz is a mentor in the Toptal Global Mentor’s Program. This program is a partnership between Toptal and General Assembly to provide high quality mentorship for students from minority and low income backgrounds who are looking to begin their careers as professional software engineers. Luiz shows commitment to diversity in tech by mentoring a General Assembly student every week for a year, covering everything from coding tips and tricks to advice on making it in the industry.


  • Languages

    SQL, CoffeeScript, CSS3, JavaScript, HTML5, Emblem, Regex, Sass, Less, PHP, HTML, CSS, ECMAScript (ES6), Python, R, Perl
  • Frameworks

    Express.js, Loopback, Ember.js, TYPO3, CakePHP, Ext JS, Bootstrap, Chrome, Sails.js, Bootstrap 3, Zend Framework, Yii
  • Libraries/APIs

    Node.js, Handlebars, jQuery, Marionette.js, Socket.IO, React, Backbone.js, D3.js, Facebook API, Twitter API
  • Tools

    Mocha, RabbitMQ, Git, Apache Solr, Stylus, Tmux, Solr, Travis CI, Jekyll, Subversion (SVN)
  • Platforms

    Android, Linux, WordPress, Drupal, CKAN, Arch Linux, Amazon EC2
  • Storage

    JSON, Neo4j, MongoDB, PostgreSQL, Redis, MySQL, Memcached
  • Other

    RESTful Web Services, Neovim, Cordova, SOX, User Interface (UI)
  • Paradigms

    Responsive Web Design (RWD), Test-driven Development (TDD), Behavior-driven Development (BDD), Object-oriented Programming (OOP), Kanban, Search Engine Optimization (SEO), Scrum


  • Ongoing Progress towards a Bachelor's Degree in Social Sciences
    2017 - 2019
    Pontifícia Universidade Católica de São Paulo - São Paulo, Brazil
  • Bachelor's Degree in Graphic Design
    2007 - 2009
    Universidade Panamericana de Arte e Design - São Paulo, SP, Brazil
  • Partially Completed Bachelor of Science Degree in Chemistry
    2005 - 2006
    Universidade de São Paulo - São Carlos, SP, Brazil

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