Vitor Hugo Queiroz, Developer in Taipa, Macao
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Vitor Hugo Queiroz

Verified Expert  in Engineering

Software Developer

Taipa, Macao
Toptal Member Since
April 4, 2016

Vitor is a software developer and Agile evangelist who loves to work with great people and passionate professionals. With eight years of web-based software experience, Vitor still loves facing the challenges of this dynamic software development universe. He is experienced in Java EE, Grails, and Rails.


PostgreSQL, JSF, Oracle, Spring Boot, Java
Grails, Java
Cflex Brain Merge
Grails, Java




Preferred Environment

MacOS, Linux, Eclipse, Spring Tool Suite (STS), RubyMine, IntelliJ IDEA

The most amazing...

...thing I've built is a piece of Brazilian tax management software using Grails and Groovy. I developed a DSL to input laws and a rules engine to process taxes.

Work Experience

Java Architect

2017 - 2018
  • Changed the current architecture to bring more flexibility to customers, from a monolithic software to independent modules, developed and deployed in different cycles.
  • Introduced continuous integration and continuous delivery.
  • Introduced new Agile techniques like TDD, domain-driven design, and behavior-driven design.
  • Applied code dojos and hands-on workshops.
Technologies: PostgreSQL, JSF, Oracle, Spring Boot, Java

Software Architect, Agile Evangelist

2013 - 2017
  • Implemented support decision systems.
  • Defined new methodologies for running a flat company.
  • Led multiple technical teams.
  • Utilized Grails and JavaFX to provide a flexible platform based on REST principles.
Technologies: Grails, Java

Software Architect

2012 - 2013
Cflex Brain Merge
  • Led a team working on Agile process definition.
  • Researched planning algorithms for the railroad industry.
  • Provided new solutions for the research and development division.
  • Implemented extreme programming techniques.
  • Implemented Agile processes to the realm of quality control.
Technologies: Grails, Java

Software Architect

2011 - 2012
Crafters Software Studio
  • Worked on a Grails application as part of larger tax management software, incorporating Groovy and DSL.
  • Developed a social network for the real estate market in Brazil using Rails and MongoDB. I was responsible for the application design, front end, and back end tiers of the project, and I worked directly with the customer to define the MVP (Main gems: jquery-rails, mongoid, devise, carrierwave-mongoid, omniauth-facebook, omniauth-twitter, fb_graph, and twitter).
  • Helped build a crowdsourcing network for concerts using Rails and Postgres. I was responsible for the application design, front-end, and back-end tiers of the project, and I worked directly with the customer to define the MVP (Main gems: sass-rails, coffee-rails, json, money, devise, carrierwave, jquery-rails).
  • Contributed to the creation of a payment gateway similar to PayPal using Rails and Postgres. I was responsible for the application design, front-end, and back-end tiers of the project and worked directly with the customer to define the MVP (Main gems: sass-rails, coffee-rails, devise, carrierwave, jquery-rails, activeadmin).
  • Managed projects using Agile methodologies.
Technologies: MongoDB, jQuery, Ruby, Ruby on Rails (RoR), Groovy, Grails

Architect, Team Leader

2009 - 2011
  • Contributed to Itax, system that analyzes Brazilian tax laws and financial records of customers to provide correct numbers, helping businesses avoid penalties.
  • Designed, analyzed, codified, and tested products.
  • Worked on Mikael, a customer care, bug tracking, and project management system for company applications.
  • Designed, analyzed, codified, and tested the product and managed the team using Scrum.
Technologies: Grails, JSF, Hibernate, JBoss, Oracle, Java


2008 - 2009
  • Worked on Copay Accumulator, a module of a BA system that provided management of co-payment to associates.
  • Designed, analyzed, codified, and tested the software.
Technologies: Full-stack


2004 - 2008
CPqD Foundation
  • Contributed to CPqD Billing, a project that provides a billing system for telecommunications and electronics companies with modules that include collection, rating, invoicing, and customer care.
Technologies: Spring, Hibernate, iBATIS, Apache Struts, Taglibs, Jakarta Server Pages (JSP), JBoss, Oracle, Java

Caipira Agil
Co-creator and organizer of Caipira Agil, a large conference on agile methods aimed at companies and professionals in Sao Paulo, Brazil.
2010 - 2011

Specialization Degree in Project Management

Brazillian Tech Institute - Campinas, Sao Paulo, Brazil

2002 - 2006

Bachelor's Degree in Computer Science

University of Sao Paulo - Rio Claro, Sao Paulo, Brazil


REST APIs, Java Collections, jQuery, Java Servlets, Taglibs, SAX


Apache Tomcat, Apache Ant, Eclipse IDE, Jenkins, Apache Maven, IntelliJ IDEA, Spring Tool Suite (STS), RubyMine, JBoss Drools


Grails, Hibernate, Spring Boot, Spring, JavaServer Faces, Spring MVC, Jakarta Server Pages (JSP), JSF, Apache Struts, iBATIS, Angular, Ruby on Rails (RoR)


Test-driven Development (TDD), Agile Software Development, Object-oriented Programming (OOP), Domain-driven Development, Behavior-driven Development (BDD), Software Testing, Continuous Integration (CI), Functional Programming, Inversion of Control


Java, SQL, JavaScript, Groovy, Ruby


MacOS, Oracle, WebSphere, JBoss, Linux, Windows, Eclipse, JavaFX


MySQL, PostgreSQL, MongoDB, Amazon S3 (AWS S3)



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