Joel is available for hire
Hire JoelJoel Santos
Verified Expert in Engineering
Full-stack Developer
Location
Porto, Portugal
Toptal Member Since
April 25, 2017
Joel has a solid background in development, having worked for over the past decade and a half. He has been a lead developer at one of the major New York advertising agencies and worked on complex projects that needed a creative and stable development solution. He specializes in technologies like Vue, React, Node.js, TypeScript, and Go and is keen on learning new ones and becoming as proficient as possible.
Portfolio
Boappa
Go, Express.js, Angular, Ionic, JavaScript, MongoDB, Node.js, SCSS, TypeScript...
Clear Street Management LLC
JavaScript, HTML, CSS, CSV, Go, SQLite, GitHub, TradingView, Vanilla JS
Sendoushi
Express.js, MongoDB, TypeScript, Go, WordPress, Laravel, Bolt CMS, Redux, Vue...
Experience
Availability
Part-time
Preferred Environment
Go, Node.js, TypeScript, API Development, Back-end, APIs, MongoDB, PostgreSQL
The most amazing...
...thing I've built was the Boappa app, a complex project where I was a full-stack developer and solved various issues both front and back end.
Work Experience
Back-end and Front-end Developer
2017 - PRESENT
Boappa
- Developed the full back end using various methodologies like DDD pattern, RPC, and REST to create an API's final and cohesive version.
- Built the whole chat section of the front and back end using Sockets.
- Created unit tests around the whole back end with a coverage of 92%.
- Architectured the back end and made it stable to a point where thousands of people are constantly interconnected.
Technologies: Go, Express.js, Angular, Ionic, JavaScript, MongoDB, Node.js, SCSS, TypeScript, APIs, API Development, Back-end, Express.io, Koa, CSS, HTML, CSS3, HTML5, JSON, REST APIs, Webhooks, API Integration, Electron, Vue 3, Vue CLI, Progressive Web Applications (PWA), Front-end Development, Responsive Web Apps, Responsive Layout, UI Development, User Interface (UI), Sass, Responsive Web Design (RWD), Data Visualization, Pixel Perfect, Responsive UI, Web Development, Architecture, UI Design, User Experience (UX), D3.js, Web UI, Web UX, CSV
Full-stack Developer
2023 - 2023
Clear Street Management LLC
- Handled the CSV upload of various actives throughout the application, persisting data through SQLite.
- Managed back-end tasks involving user authentication and active management.
- Leveraged Vanilla JS in the front end to show the table of actives and graphs of that same data with TradingView.
Technologies: JavaScript, HTML, CSS, CSV, Go, SQLite, GitHub, TradingView, Vanilla JS
Full-stack Developer
2010 - 2020
Sendoushi
- Created and designed games with several technologies from HTML and JavaScript to Flash or even Haxe.
- Built various institutional clients' websites with CMS or simple static websites.
- Developed multiple open-source projects. Some were used in several packages.
- Acted as a consultant to companies that needed better workflows through code.
Technologies: Express.js, MongoDB, TypeScript, Go, WordPress, Laravel, Bolt CMS, Redux, Vue, React, Angular, Backbone.js, jQuery, ECMAScript (ES6), JavaScript, SCSS, CSS, HTML, Babel, Webpack, Node.js, CSS3, HTML5, JSON, REST APIs, Webhooks, API Integration, Electron, Vue 3, Vue CLI, Progressive Web Applications (PWA), Front-end Development, Responsive Web Apps, Responsive Layout, UI Development, User Interface (UI), Sass, Responsive Web Design (RWD), Data Visualization, Pixel Perfect, Responsive UI, Web Development, Architecture, UI Design, User Experience (UX), D3.js, Web UI, Web UX, CSV
Lead Front-end Developer
2016 - 2017
BFM | Blue Fountain Media
- Developed various institutional clients' websites with several technologies.
- Created a standard for build systems, code quality, and website structure.
- Interconnected complex back-end systems (Drupal, Magento, etc.) into the front-end side.
Technologies: TypeScript, WordPress, Vue, jQuery, ECMAScript (ES6), JavaScript, SCSS, CSS, HTML, Babel, Webpack, Node.js, CSS3, HTML5, JSON, REST APIs, API Integration, Vue 3, Vue CLI, Progressive Web Applications (PWA), Front-end Development, Responsive Web Apps, Responsive Layout, UI Development, User Interface (UI), Sass, Responsive Web Design (RWD), Pixel Perfect, Responsive UI, Web Development, Architecture, UI Design, User Experience (UX), Web UI, Web UX
Full-stack Developer
2013 - 2015
Baboom
- Created a tool for translators to easily target and translate several pieces of information throughout the application.
- Managed the general project style guide to be used by designers and developers.
- Developed, with a team, the main Baboom project into a production project that, on the first day, had over 1 million registered users.
Technologies: Express.js, MongoDB, TypeScript, Node.js, JavaScript, CSS, HTML, CSS3, HTML5, JSON, REST APIs, Webhooks, API Integration, Electron, Vue 3, Vue CLI, Progressive Web Applications (PWA), Front-end Development, Responsive Web Apps, Responsive Layout, UI Development, SCSS, User Interface (UI), Sass, Responsive Web Design (RWD), Data Visualization, Pixel Perfect, Responsive UI, Web Development, UI Design, User Experience (UX), D3.js, Web UI, Web UX, CSV
Creative Director | Developer
2012 - 2012
COVII | Computer Vision Interaction
- Built websites for the company's projects and the main company website.
- Developed applications to interact with 3D sensors, from games to maps to general data visualization.
- Created a full-blown 3D wizard for clients to visualize, modify and select, using the 3D-sensor technology from the company.
Technologies: C, WordPress, JavaScript, Flash, CSS, HTML, CSS3, HTML5, Front-end Development, Responsive Web Apps, Responsive Layout, UI Development, SCSS, User Interface (UI), Sass, Responsive Web Design (RWD), Pixel Perfect, Responsive UI, Web Development, Architecture, UI Design, User Experience (UX), Web UI, Web UX
Full-stack Developer
2009 - 2010
SKA, Brand Development
- Developed institutional websites for several clients using several technologies. Most of these websites received multiple awards.
- Created various types of media like video or installations.
- Developed and designed games for several institutions.
Technologies: JavaScript, Flash, CSS, HTML, CSS3, HTML5, Front-end Development, Responsive Web Apps, Responsive Layout, UI Development, SCSS, User Interface (UI), Sass, Responsive Web Design (RWD), Pixel Perfect, Responsive UI, Web Development, Architecture, UI Design, User Experience (UX), Web UI, Web UX
Freelance Designer | Freelance Developer
2004 - 2008
Freelance Work
- Built institutional websites for several clients with various technologies.
- Created various media projects like full institutional graphics, identities, fonts, etc.
- Participated in several design competitions, winning some of them.
Technologies: Express.js, MongoDB, JavaScript, Flash, CSS, HTML, CSS3, HTML5, Front-end Development, Responsive Web Apps, Responsive Layout, UI Development, Less, SCSS, User Interface (UI), Sass, Responsive Web Design (RWD), Pixel Perfect, Responsive UI, Web Development, Architecture, UI Design, Web UI, Web UX
Experience
Boappa
https://boappa.se/An app to manage your home within a company. I've been building the project for several years. Started as a full stack and moved to be focused only on the back-end side. The app uses Node.js, MongoDB, WebSockets, and Redis to ensure the chat, the feed, and all the features work well and are stable. I am quite proud of the project since I was the one who architectured the whole back end and am working in production with several thousand people connected simultaneously.
NeonCEO
A social community to connect companies and workers with chat and social features. Started to work on the project as a front-end developer using React but eventually grew to be the back-end developer and handled GraphQL and PostgreSQL.
Intricately
https://intricately.com/The project gathered and stored data for big companies to analyze. A huge set of data under Elasticsearch. A very complex tool that needed to interact directly with the Elasticsearch server and retrieve the data with the filters set at the front end.
MyFocus API
An aggregator of several APIs. Worked with the Google API, Dropbox API, and Office API and joined them into a single API to be used by the main project. With a single API call, you would have access to all your email, calendar, files, and spread in various services.
Baboom
http://www.baboom.comBaboom is a music-streaming service directed at indie musicians. It intends to be a fair-trade streaming service where musicians are given what they deserve. An amazing project that received 1 million users on the first day of its launch.
Gordon Brown
A law company website where I've done all the development. They requested an institutional website with full CMS control. A project built in tandem with a designer, which received several awards and compliments.
Pomodoro
https://github.com/joesantosio/pomodoroA simple Pomodoro technique module with CLI. Used it for several years, organizing and developing my methodology of work. Nowadays, I don't need to use it because it is part of my routine. A fun project using the CLI to build a tool I could use daily.
MrCrowley
https://github.com/Sendoushi/mrcrowleyRetrieve data from different databases using HTML elements to gather your needed information. The tool evolved to a private repository with Go and is currently in production scraping. Used with a multitude of clients for very different aims.
Babel Plugin: Remove Code
https://github.com/Sendoushi/babel-plugin-remove-codeRemove any code from your project. The project has been used through npm on several projects now. Even though it is outdated nowadays, removing code we as developers didn't want in the production build was very useful.
Skills
Languages
JavaScript, ECMAScript (ES6), SCSS, TypeScript, HTML, CSS, CSS3, HTML5, Sass, Go, PHP, Less, Python, C, Rust
Frameworks
Express.js, Koa, Ionic, Express.io, Redux, Electron, Angular, AngularJS, Laravel, Vanilla JS
Libraries/APIs
API Development, jQuery, Backbone.js, Node.js, React, Vue, Socket.IO, REST APIs, Chai, Sinon.JS, Sockets, Slack API, Google API, D3.js, Facebook API, Gmail API, Office 365 API, Dropbox API
Tools
Gulp, Webpack 2, Babel, Webpack, Photoshop CC, Illustrator CC, Sketch, Mocha, Git, Vue CLI, Grunt, Bolt CMS, GitLab, GitHub, Flash, NPM
Paradigms
Web Architecture, REST, Functional Programming, Unit Testing, Microservices, Test-driven Development (TDD), Responsive Layout, Responsive Web Design (RWD), UI Design, Scrum, Agile, Object-oriented Programming (OOP), MVC Design
Platforms
MacOS, Linux, Windows, WordPress, Amazon Web Services (AWS), Visual Studio Code (VS Code), Google Cloud Platform (GCP)
Storage
MongoDB, JSON, SQLite, SlimPHP, MySQL, PostgreSQL, Elasticsearch, Redis
Other
Web Scraping, WebSockets, APIs, Back-end, PSD to HTML, FontLab, Illustrator to HTML, Scraping, Chatbots, Full-stack, Webhooks, API Integration, Front-end Development, Responsive Web Apps, UI Development, User Interface (UI), Pixel Perfect, Responsive UI, Web Development, User Experience (UX), Web UI, Web UX, CSV, Software Architecture, Architecture, Vue 3, Progressive Web Applications (PWA), Data Visualization, Computer Science, Front-end, TradingView
Education
2006 - 2009
Bachelor's Degree in Communication Design
ESAD - Porto, Portugal
Certifications
MARCH 2017 - PRESENT
CS50, Computer Science
Harvard University | edX
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