Lucas Souza

Sao Paulo, Brazil

Member since February 26, 2014

Lucas' past projects provided him with a variety of developer skills, which he knows how to apply to almost all levels of performance, availability and scalability issues. He worked with a lot of technologies which allows him to use the right language to solve the right problem.

Lucas is now available for hire

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Portfolio

GetNinjas
Ruby on Rails, Backbone, Daemon Kit, AWS, Chef, DevOps
R7.com
Ruby on Rails, RabbitMQ, Varnish, Memcached, Redis, MongoDB, Sinatra, Scala
Caelum
Java, Ruby on Rails, Javascript

Experience

Ruby, 4 years
Capybara, 4 years
Ruby on Rails, 4 years
Rack, 4 years
Amazon SQS, 1 year
RSpec, 4 years
Object-oriented Programming (OOP), 7 years
Plain Old Ruby Object (PORO), 4 years

Availability

Part-time

Preferred Environment

Mac OS X, Vim, Iterm, Google Chrome, Git

The most amazing...

...thing I've coded was the new CMS of R7.com. In doing so I used a lot of technologies like RabbitMQ, EventMachine, Scala, Rails, Sinatra, Solr, Varnish, etc.

Employment

Software Engineer
GetNinjas
2013 - PRESENT
- Supported an existing website built with Ruby on Rails, MySQL and AWS.
- Created a new mobile application using Backbone and PhoneGap to facilitate the communication between customers and clients.
- Created recipes to automate the existing infrastructure of any environment.
- Created a new payment system, integrating with MoIP and PayPal.
- Created daemons responsible for processing messages from SQS. Used REST to keep the system decoupled.
Technologies: Ruby on Rails, Backbone, Daemon Kit, AWS, Chef, DevOps
Software Engineer
R7.com
2011 - 2013
- Created a platform using ImageMagick to support images in different formats and sizes.
- Created the new CMS interface using Rails and JavaScript, for journalists to use everyday.
- Created a gem to paginate queries on databases using Mongoid and MongoDB.
- Created the infrastructure to cache every page using Varnish and HTTP Headers.
- Created a gem that enables REST communication between CMS and Delivery platform.
Technologies: Ruby on Rails, RabbitMQ, Varnish, Memcached, Redis, MongoDB, Sinatra, Scala
Developer, Instructor and Consultant
Caelum
2009 - 2011
- Taught courses in: Basic Java, Web Java, EJB Java, Agile (XP and Scrum), Ruby on Rails and Rspec.
- Worked as Chief Editor for InfoQ Brasil. Responsible for translating, creating and reviewing technological articles.
- Wrote the first Brazilian book about Ruby: "Ruby a linguagem mais divertida".
- Created two courses, one on Hibernate and one on JSF.
- Supported open-source projects like: Caelum Stella, Restufie, etc.
Technologies: Java, Ruby on Rails, Javascript
Java Developer
Silt
2007 - 2009
- Supported a WMS system using JSP, Servlets, Struts 2.
- Created a system using Google Web Toolkit, Hibernate and Oracle to manage the main Education Company in Brazil.
- Created a system using Google Web Toolkit, GXT and Hibernate to track the company's assets.
- Coached other developers, teaching them how to use Google Web Toolkit and how to test, using JUnit.
- Performed a big refactoring on WMS system to replace Struts 2 with Vraptor.
Technologies: Java, Google Web Toolkit, JSP, Struts 2, VRaptor
Java Developer
Visual Midia
2006 - 2007
- Supported an existing system responsible to manage the school students' information, using SWT and Prevayler.
Technologies: Java, SWT, Prevayler, JUnit

Experience

CMS for R7.com (Development)
http://r7.com
R7.com is the second Web Portal from Brazil and they had a poor CMS written in Java.
My team worked to build a new solution to replace it, using Ruby, Event Machine, RabbitMQ, Varnish, and various other tools. Today the project is still growing, so that proves our effort in building a quality system was worth it.

Skills

Languages
Ruby, Unicorn, Java, JavaScript, Scala, SQL
Frameworks
Ruby on Rails, Capybara, VRaptor, Sinatra, Google Web Toolkit, JSF2, Padrino, Apache Struts 2, AngularJS
Libraries/APIs
Rack, Amazon SQS, AMQP, AMQP(RabbitMQ), SWT, EventMachine, jQuery, Underscore.js, Backbone.Marionette, Redis Queue, Prevayler, Amazon API, Backbone.js, Google Maps, MailChimp API, Facebook API, Twitter API, Mahout
Tools
RSpec, Vim, Varnish, Eclipse IDE, RVM, Nginx, Chef, ITerm, MacVim, RabbitMQ, GCC, MySQL Workbench, Passenger, Nagios, SBT, Google Cloud Messaging, Capistrano
Paradigms
Object-oriented Programming (OOP), Test-driven Development (TDD), Agile Software Development, Plain Old Ruby Object (PORO), Behavior-driven Development (BDD), Functional programming
Storage
MongoDB, RDS, Memcached, MySQL, Redis, HDFS, SQL Server 2000, Oracle
Platforms
Mac OS X, Ubuntu, iOS, Windows 7
Misc
New Relic

Education

Bachelor's degree in Computer Engineering
Ribeirão Preto University - Ribeirão Preto - SP
2003 - 2007

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