Rafael Cordeiro
Verified Expert in Engineering
Full-stack Developer
Burnaby, Canada
Toptal member since April 17, 2023
Rafael is a helpful, ethical, and zealous full-stack developer with experience in IT security. He approaches challenging situations by breaking them down into smaller tasks and using code to solve them. He's a quick learner who loves analyzing and solving technical issues, and he believes every problem can be solved using logs and debugging skills. For him, there's no better feeling than discovering the root cause of a complex problem or a performance issue.
Portfolio
Experience
- C# - 20 years
- Web Applications - 20 years
- Database Design - 20 years
- .NET - 20 years
- SQL Server DBA - 20 years
- Web Security - 5 years
- TypeScript - 2 years
- Three.js - 2 years
Preferred Environment
Windows, .NET, C#, TypeScript, React, SQL Server DBA, Web Applications, API Applications, Web Security
The most amazing...
...thing I've done is improve the company system's performance, security, and stability by up to five times.
Work Experience
Senior Full-stack Developer
CadMakers
- Developed a web system using C#, ASP.NET Core MVC, and web APIs.
- Created features for the new front end in React and WebGL 3D environment in Three.js.
- Improved the performance of company software and systems.
SQL Server Database Administrator | Senior C# Developer | Cloud Administrator
Omnae
- Developed a web system with C#, ASP.NET MVC, and web APIs.
- Refactored and improved the performance of the main site and SQL Server.
- Served as a cloud and database administrator, managing and maintaining the existing databases and cloud servers.
Senior Developer and Architect | Partner
Red Beach Technologies
- Developed an internal system using C# to compile all information from our clients. Provided IT consulting and development services.
- Identified and neutralized a hacker attack that was scraping data from the platform.
- Rewrote the original ETL system using C# with the TPL dataflow to improve the system's performance.
Ethical Hacker | Application Security Engineer
Oi
- Monitored and tested applications and systems aimed at mitigating security risks.
- Educated developers about top security risks, mitigating risk, and keeping all systems secure using OWASP.
- Kept track of internal projects to ensure the code followed all expected security standards.
Senior C# Developer | SQL Server Database Administrator
MundiPagg
- Enhanced the performance and added new functionality to the company's anti-fraud system using web and RESTful APIs. The main API used Windows Communication Foundation (WCF), web APIs, and Entity Framework 6, and the anti-fraud system used web APIs.
- Conducted database administration for the main financial transaction SQL Server Always On cluster to improve the performance and archive old data.
- Oversaw the Black Friday sales for the company and its clients.
Senior C# and Java Developer
Eco Sistemas
- Improved the performance of company databases, suggesting better indexes and queries.
- Maintained a system built in Java, Jakarta EE, and JBoss, improved its performance, and added new features.
- Started building a new ASP.NET MVC SPA in jQuery Mobile to simulate native iOS and Android apps.
- Implemented a centralized log system that helps quickly identify system fails and slow resources to increase customer satisfaction.
- Helped create a system to integrate data from all other systems in one schema. Used ESB, SOAP, REST, and WCF for system communication.
Adobe Flex and AIR Developer
Petrobras
- Created multiple RIA front ends using Adobe Flex and ActionScript 3.
- Developed a C#.NET service to allow Flex to consume data from SAP Business Warehouse.
- Resolved numerous persisting issues that other employees weren't able to solve.
Experience
Estaciona App
Education
Postgraduate Degree in Data Warehousing and Data Mining
Coordenação Central de Educação Continuada PUC-Rio - Rio de Janeiro, RJ, Brazil
Master of Business Administration (MBA) in IT Management and Computer System Administration
Federal Fluminense University - Niteroi, RJ, Brazil
Bachelor's Degree in Information Technology and Computer Science
Estacio de Sa University - Niteroi, RJ, Brazil
Technical High School Diploma in Electronics
Federal Center for Technological Education of Rio de Janeiro - Rio de Janeiro, RJ, Brazil
Certifications
JavaScript (Basic) Certificate
HackerRank
C# and .NET (Hard)
TestDome
C# Algorithms (Hard)
TestDome
C# (Hard)
TestDome
Rest API (Intermediate) Certificate
HackerRank
Problem Solving (Basic) Certificate
HackerRank
C# (Basic) Certificate
HackerRank
Web Development
RED Academy
Shaping up with AngularJS
Code School
MCSE 70-210: Installing, Configuring, and Administering Microsoft Windows 2000 Professional
Microsoft
Skills
Libraries/APIs
Web API, Three.js, React, WebGL
Tools
Adobe AIR, MATLAB
Languages
C#, TypeScript, C#.NET, JavaScript, Lua, Java, ActionScript 3, HTML5, CSS3, Prolog, HTML
Frameworks
.NET, AngularJS, Corona SDK, Adobe Flex, ASP.NET
Platforms
Windows
Storage
Databases, SQL Server DBA, Azure SQL Databases, MongoDB
Paradigms
Database Design, REST, ETL
Other
Web Applications, API Applications, Web MVC, Web Development, Azure Administrator, Application Security, Algorithms, English, Web Security, Complex Problem Solving, IT Support, Data Warehousing, Data Mining, IT Administration, Windows System Administration, Programming, Electronics, SAP Business Warehouse (BW), Windows Communication Foundation (WCF)
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