Gabriel Queiroz Silva, Developer in Brasília - Federal District, Brazil
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Gabriel Queiroz Silva

Verified Expert  in Engineering

Software Developer

Brasília - Federal District, Brazil
Toptal Member Since
January 10, 2017

Gabriel is a certified Magento developer who writes clean code and follows best practices, and he is also an experienced PHP developer. He has a vast knowledge on Magento (versions 1 and 2) and private cloud management using XenServer and Opscode Chef Server. He decided to have a go at freelancing because he wanted to focus on development, work on interesting projects, and have the freedom to travel.


Flow eCommerce
Amazon Web Services (AWS), Bacula, XenServer, Chef, Python, Ruby, MySQL, PHP 7...
Timor Leste Republic Government
WordPress, PHP, Ubuntu Linux
International Labour Organization
Stellent Content Management System, Oracle, Python, Java




Preferred Environment

Git, PhpStorm, MacOS

The most amazing...

...project I have worked on was an eCommerce platform, built on top of Magento, used by over 300 eCommerce websites.

Work Experience

CTO | Co-Founder

2008 - 2016
Flow eCommerce
  • Co-founded and operated a successful startup.
  • Delivered over 300 eCommerce projects for clients from diverse countries such as Brazil, Argentina, Chile, and Bermuda.
  • Provided, in partnership with the government, consulting and created eCommerce websites for more than 30 small-and-medium companies.
  • Managed a team of 7 members in total; apart from freelancers and outsourcing from different cultures and in different locations (Brazil and India).
  • Helped 90+ clients with hosting, using a private cloud composed of around 30 nodes, following a 99.5% uptime SLA and delivering over 2 million page views per month.
  • Developed partnerships with key players in the Brazilian eCommerce market.
  • Implemented the Agile software development methodology using the Scrum framework.
  • Created and maintained over 90 Magento extensions—including payment processing, caching strategies, third party integrations, and UI improvements.
Technologies: Amazon Web Services (AWS), Bacula, XenServer, Chef, Python, Ruby, MySQL, PHP 7, PHP 5, Magento 2, Magento 1


2009 - 2009
Timor Leste Republic Government
  • Improved the performance and security of the government’s website production environment (
Technologies: WordPress, PHP, Ubuntu Linux

Web Developer

2007 - 2007
International Labour Organization
  • Developed 4 websites for the regional ILO field offices within the ILO global website using the Stellent CMS (Java + Oracle).
  • Created Java components and Python scripts to automate the creation of new websites for the ILO field offices.
  • Installed and supported wiki and project collaboration tools for internal use tested.
Technologies: Stellent Content Management System, Oracle, Python, Java

PHP Specialist

2006 - 2007
  • Managed a team composed of 7 web developers.
  • Created a process for development cost estimation.
  • Created a process for issues management using Active Collab, an open source alternative to Basecamp.
Technologies: Linux, Gentoo, Ubuntu Linux, PostgreSQL, MySQL, PHP

Project Manager

2006 - 2006
  • Planned and monitored some of the department’s key projects including: Metro Ethernet, IP Traffic Analyzer, and video/audio conferences for corporate clients.
Technologies: PMBOK

Software Engineer

2005 - 2006
  • Participated on the successful development of 2 large information systems for the Brazilian government, entirely made in PHP and using Oracle and PostgreSQL as DBMS; being hosted by the Brazilian federal government and used by all of the ministries, government agencies, and the private companies willing to work with the government.
  • Automated the approval of the government marketing campaigns through the development of a Soap API used by government agencies, ministries, and private companies.
  • Managed the training for the Brazilian government data processing department (Serpro) which is responsible for the maintenance of the above mentioned system.
  • Developed a system used in a stand in Rock in Rio Lisbon—where users would take photos and they would be automatically posted to a website.
  • Executed Q&A on projects and fixed some of the company's projects.
Technologies: Ubuntu, PostgreSQL, MySQL, PHP

Web Developer

2004 - 2005
Fábrica de Idéias (
  • Developed a digital video recording and tagging system.
  • Participated on the development of a statistical database of all Brazilian municipalities, having the World Bank as a client.
  • Developed 2 websites using the company's home build CMS.
Technologies: Perl, Shell, Linux, Gentoo, MySQL, PHP

Web Developer

2003 - 2004
Agência de Notícias dos Direitos da Infância
  • Developed the NGO's website.
  • Developed the NGO's intranet portal.
  • Provided support for the CMS and intranet portal users.
Technologies: Microsoft SQL Server, Active Server Pages (ASP)

Casa Rio Grande do Sul
Developed, hosted, and supported the Casa RGS website—a local company in Brazil specializing in home decor and wedding registries.

Clube de Vinhos GB

A wine club with a recurring payment solution for subscribed members using as payment methods: credit cards and Boleto (a common Brazilian payment option).

Quality Nutrition
A sports nutrition eCommerce website where I was responsible for the development of extensions regarding tax invoicing, payment, and shipping methods as well as hosting and support

International Labour Organization Offices' Websites

Developed several ILO office websites, using the Stellent CMS (Java + Oracle).

Timor Leste Republic Government Website Production Environment
Hired by the Timorese government as a consultant to improve the performance and security of the government’s website production environment (

Coritiba Store

The official eCommerce website for Coritiba—a soccer team competing in the Brazilian main league. The hosting structure was responsible for handling large traffic spikes whenever a new version of the team's jersey was available.

Edições CNBB
Conferência Nacional dos Bispos do Brasil (CNBB) is the Brazilian representative of the Vatican, and Edições CNBB is the company responsible for selling all of its editorial content to churches in Brazil. Responsible for the development and hosting of the website.

Floresta Flores
This is a flower shop website. I was responsible for payment and shipping method integrations, as well as hosting, and general support


As a PHP specialist, I worked as a team leader for the PHP development team; being responsible for Q&A and project management.

Tigo Money Official Magento Integration (via Toptal)

Developed the official integration for the payment method Tigo Money. The development involved checkout modifications and proper order status handling after the payment process has been completed.
2002 - 2008

Bachelor's Degree in Electrical Engineering

Universidade de Brasília - Brasília, DF, Brazil




Magento Modules, PhpStorm, Chef, Apache, NGINX, Bitbucket, Citrix Xencentre, Git, Shell, Stellent Content Management System, Docker Compose, Docker Hub, GitLab, Subversion (SVN)


PHP 7, PHP 5, PHP, JavaScript, Perl, Active Server Pages (ASP), Python, Java, Ruby


Magento Community Edition, Magento, Magento 2, Magento API, Magento 1, Docker, Xen, Linux, XenServer, Ubuntu Linux, MacOS, Ubuntu, WordPress, Oracle, Amazon Web Services (AWS), New Relic


Agile Software Development, PMBOK, Continuous Delivery (CD), Prototype-based OOP


Knockout (Knockout.js), PHPUnit, Zend Framework, Hadoop, Apache Spark, Symfony, Prototype Framework


MySQL, Microsoft SQL Server, PostgreSQL, Redis


Client Management, Web Hosting, Ubuntu Server, Bacula, Gentoo, Unix Shell Scripting, DNS

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