Gustavo César Muniz e Souza, Developer in São Paulo, Brazil
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Gustavo César Muniz e Souza

Verified Expert  in Engineering

Full-stack Software Developer

São Paulo, Brazil
Toptal Member Since
March 4, 2014

Gustavo is a Microsoft systems architect and developer with 20 years of experience in IT. He works with alternate open-source platforms and cloud computing, focusing on highly scalable eCommerce websites. Gustavo has an extensive background in software architecture, design, analysis, and implementation and is currently improving his skills in the JavaScript ecosystem and Blockchain.


New York-Based Trading Firm
Angular, TypeScript, Node.js, Express.js, NGINX, Microsoft SQL Server...
Git, Tableau, BigQuery, Data Analysis, Communication, Team Mentoring, Training...
Git, Tableau, Jira, Communication, Technical Requirements




Preferred Environment

Visual Studio, Windows, Azure, MacOS, .NET, JavaScript

The most amazing...

...thing I've made is a highly available and scalable B2B integration with the major airline companies in Brazil for

Work Experience

Full-stack JavaScript Developer

2022 - 2022
New York-Based Trading Firm
  • Delivered a proof of concept application to duplicate features from an existing desktop app into a web app with a clean and modern SPA user interface.
  • Worked with large volumes of data from the financial market stored in an MSSQL database.
  • Built with state-of-the-art JavaScript tools, an application with a back end developed in Node.js and Express.js and a front end in Angular and Nebular templates.
  • Dashboard and grid feature based on ngx-admin from Akveo.
  • Deployed to Linux using Nginx for the front end and PM2 for the back end.
Technologies: Angular, TypeScript, Node.js, Express.js, NGINX, Microsoft SQL Server, JavaScript

Team Lead, Development Matchers

2018 - 2021
  • Oversaw the work of development matchers as the first team lead of the development matching team.
  • Recruited, interviewed, onboarded, and trained dozens of matchers.
  • Worked with continuous improvement approaches to find training and mentoring opportunities and ensure that best practices were always followed.
  • Enforced the importance of following processes and guidelines through proactive and reactive monitoring.
  • Contributed to improving several processes over the years to make the matching role as efficient and streamlined as possible and the ramp-up smooth and shorter.
  • Contributed to establishing the fundaments of goals and metrics necessary to monitor matchers’ performance and improvement opportunities.
  • Participated in multiple cross-team collaboration efforts with sales, legal, finance, client services, talent success, community, and other departments.
Technologies: Git, Tableau, BigQuery, Data Analysis, Communication, Team Mentoring, Training, Recruiting, Balance Scorecards, Documentation

Director of Engineering

2016 - 2018
  • Gathered client requirements and expectations for their development jobs in order to find the best talents available within the very selected pre-vetted Toptal’s pool of talents.
  • Acted as a technical account manager and first point of contact for support for active engagements for clients and talents.
  • Interacted with multiple internal teams (sales, finance, legal, and customer services) in order to coordinate and ensure the best quality of service was always delivered.
  • Worked directly with conflict resolutions on engagements to acknowledge, investigate, and find the best possible solution for all parts involved, including performing code reviews.
  • Worked on constantly improving soft and hard skills to be as up-to-date as possible with all the newest technologies and trends needed by the clients.
Technologies: Git, Tableau, Jira, Communication, Technical Requirements

Systems Engineer

2015 - 2015
CHEP Aerospace
  • Reorganized a large project's dependencies, moving external libraries to NuGet management and configuring bundles for all included.
  • Refactored large portions of the site, migrating Backbone.js pieces to AngularJS implementations, aiming for standard technology.
  • Implemented complex AngularJS functionalities using nested directives for improved organization and maintainability attached to preexistent webpages, creating a rich UX on a non-SPA website.
  • Migrated old-fashioned implementations with heavy stored procedures to modern and easier to maintain Entity Framework queries.
Technologies: Backbone.js, AngularJS, C#, .NET, Microsoft SQL Server, JavaScript

Desktop Developer

2015 - 2015
Balyasny Asset Management
  • Implemented RESTful services with a .NET Web API to start migrating from WCF.
  • Developed WPF applications improvements for allocation of funds.
  • Created a remote development environment on Azure to bypass network restrictions for the company.
  • Implemented Azure management tasks like migrating VMs and configuring systems and databases.
Technologies: Azure, Windows Presentation Foundation (WPF), Web API, C#, Microsoft SQL Server, .NET

Full-stack Developer

2014 - 2014
Benthal Group
  • Conducted a series of benchmarking tests with a range of NoSQL databases (Cassandra, Riak, and MongoDB) looking for alternatives for TempoDB.
  • Researched alternatives for front-end libraries to be adopted, such as AngularJS, Ember.js, etc.
  • Implemented the first AngularJS prototypes inside the Ruby app.
  • Implemented the AngularJS + Sockets.IO integration for real-time updates.
Technologies: Socket.IO, AngularJS, Ruby, NoSQL, JavaScript

Development Team Leader

2011 - 2014
  • Worked as a team leader using Agile methodologies like Scrum, XP, and Kanban.
  • Handled software development with OpenSource technologies.
  • Designed and developed a new company product named Cruises.
  • Designed and developed a new company product named VacationRentals.
  • Tracked the application performance with NewRelic and Omniture.
  • Implemented B2B integration with cruise companies, including Royal Caribbean, Costa, Carnival, and MSC, and rental companies, such as Flipkey and Zukbox).
Technologies: MongoDB, MySQL, JavaScript, NoSQL

.NET Systems Developer

2009 - 2010
  • Handled software development with ASP.NET and WCF.
  • Dealt with ALM (Application Lifecycle Management) based in TortoiseSVN.
  • Implemented the B2B integration between a Brazilian airline company's web services and the website.
  • Designed highly scalable, highly available systems architectures.
  • Developed websites with ASP.NET WebForms and mvcDeveloped websites with ASP.NET WebForms and MVC.
Technologies: Microsoft SQL Server, Windows Communication Foundation (WCF), ASP.NET, .NET, C#

.NET Systems Architect

2005 - 2009
JBS Group
  • Designed and developed a new .NET-based ERP framework, replacing the former Delphi version.
  • Handled website development for foreign customers’ relationship.
  • Deployed, adopted, and administered the team foundation server, a Microsoft software platform for ALM (application lifecycle management).
  • Developed reports with Crystal and Reporting Services.
  • Managed virtualized servers with VMWare for infrastructure optimization.
Technologies: Windows Communication Foundation (WCF), Web Services, jQuery, ASP.NET, C#, Microsoft SQL Server, .NET

.NET Senior Developer

2005 - 2005
Advanced Iteam Consultoria em Informática
  • Developed web applications with C# and Visual Basic .Net.
  • Developed integration solutions for SAP R3 and .NET through an RPC plugin.
  • Maintained legacy VB6 systems and generated reports with Crystal.
Technologies: Web Services, ASP.NET, C#, Microsoft SQL Server, .NET

.NET Team Leader

2004 - 2004
ArchITettura Soluções em Tecnologia
  • Gathered requirements, analyzed and developed C# .NET projects.
  • Led the development team using the Agile methodology.
  • Designed a prototype and architecture for a full-featured accounting solution.
Technologies: C#, .NET, Microsoft SQL Server

Data Analyst

2001 - 2003
  • Analyzed and developed statistical projects based on MS SQL DTS.
  • Developed ETL applications to feed a Cognos BI database.
  • Worked on data enrichment and polishing for data analysis of market trends and targeted market campaigns.
Technologies: Microsoft SQL Server Vacation Rentals
"Vacation Rentals" is a product website designed from scratch as a solution focusing on property owners, detaching them from the Hotel's focused product.
The site's purpose is to connect owners and travelers through an announcement model closer to newspapers than travel agencies with a different approach.
It was developed with Jakarta EE and Freemarker, with a NoSQL database solution allowing high scalability with simplified system architecture. Cruises
The "Cruises" product website was the most important project at in 2011, as it was the only new product with revenue to be launched.
It was developed using Jakarta EE + Grails with a MySQL database. The project involved a massive effort of systems integration with the cruise companies and a lot of attention on user experience.

Website built in Ruby on Rails, D3, and AngularJS created to process heavy amounts of data from time series NoSQL databases in a smooth and well-designed web application.
Real-time communication is implemented with Sockets.IO.
NoSQL platforms benchmark included MongoDB, Cassandra, and Riak, all deployed in Docker images running in Heroku servers.

SPA ToDo App
SPA (Single Page Application) to-do list built with .NET C# MVC, Web API restful services with OAuth integration, and Knockout.js. This was a small application designed to explore new technologies and expand my portfolio for new potential projects.

Abaris Analytics

Full-stack AngularJS app using Yeoman, designed to be a rich user interface dashboard for data analysis for Abaris's data API. We built the charts with NVD3 connected in real time to multiple REST APIs. Code is in a private repository.
2013 - 2014

MBA Degree in Business Administration and Management

Fundação Getulio Vargas - São Paulo-SP

2002 - 2007

Bachelor's Degree in IT - Data Processing

Faculdade de Tecnologia de São Paulo - São Paulo-SP


Microsoft Certified Professional Developer Degree in Enterprise Application Development



Microsoft Certified IT Professional Degree in Database Development on SQL Server



AngularUI, Web API, Socket.IO, Mustache, Backbone.js, Google Maps, jQuery UI, jQuery, D3.js, Node.js, NVD3


Visual Studio, Yeoman, GitHub, Git, Jira, Trello, Tableau, Bower, Jenkins, GitLab, BigQuery, Confluence, NGINX


AngularJS, .NET, ASP.NET MVC, ASP.NET, Knockout (Knockout.js), ASP.NET Web API, Bootstrap, Ruby on Rails (RoR), Windows Presentation Foundation (WPF), Angular, Express.js


Object-oriented Programming (OOP), Database Development, Continuous Integration (CI), Model View ViewModel (MVVM), Model View Controller (MVC), Asynchronous Programming, Model-driven Engineering (MDE), REST, Kanban, Dependency Injection, Scrum, Agile Software Development, Load Testing, Design Patterns, Unit Testing, Test-driven Development (TDD)


T-SQL (Transact-SQL), C#, SQL, CoffeeScript, JavaScript, HTML, ECMAScript (ES6), Ruby, Less, CSS, XAML, Java, TypeScript


Azure, Heroku, Oracle Database, MacOS


Microsoft SQL Server, SQL Server Reporting Services (SSRS), Databases, NoSQL, MongoDB, MySQL, Oracle SQL, JSON, PostgreSQL


Windows Communication Foundation (WCF), Front-end Development, Data Analysis, Single-page Applications (SPA), Angular Bootstrap, Multithreading, Team Mentoring, Training, Balance Scorecards, Documentation, Web MVC, Web Services, Communication, Technical Requirements, Recruiting

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