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Fabiano Cardoso
Verified Expert in Engineering
C++ Developer
São Paulo - State of São Paulo, Brazil
Toptal member since February 28, 2019
Bio
Fabiano is an architect/senior software engineer and technical lead with solid academic knowledge and experience designing C, C++, and Python applications. Additionally, he is an expert in UNIX and Windows with communication protocol TCP/IP. Fabiano has participated in all phases of a software development cycle—collecting requirements, writing specifications and designs, coding, testing, and training. He performs very well in teams and often mentors those around him.
Portfolio
Toptal Clients
Debugging, Design Patterns, Data Structures, Algorithms, Microsoft Unit Tests...
GFI/Aurea
Debugging, Design Patterns, Networking, Data Structures, Algorithms, C++17...
Infosys
Algorithms, Background Threading, JSON, XML, Sockets, TCP/IP, OCMock, MacOS...
Experience
- Microsoft Visual Studio - 20 years
- C++ - 18 years
- C - 18 years
- GCC - 12 years
- TCP/IP - 12 years
- Python - 7 years
- Qt - 4 years
- Qt Creator - 3 years
Preferred Environment
Vi, Visual Studio, Boost, C, C++, Windows, Linux, Python
The most amazing...
...project I've done involved an OS that no one in the company had any knowledge about. I studied and coded a new app, and it became one of the best in the market.
Work Experience
Senior Software Developer (C++ and Python)
2019 - PRESENT
Toptal Clients
- Ported a database system from Go to C on Debian Linux, improving stability and speed. The new system loads 10 million records 10 times faster and uses less memory. Also wrote the documentation and most of the tests.
- Coded a C++ library to access SQL engines and process queries. Wrote tests, pairing each production class with a test class to ensure quality. Brought new ideas to the existing client framework (C++, Visual Studio, Clang, CMake, SQL, and MS tests).
- Worked on a DNS server system used by one of the largest internet gaming companies in the world, fixing bugs and optimizing the code. Utilized C++, C, GCC, Make, and Linux.
- Developed GIS mapping software, fixing bugs and updating the code to use newer versions of third-party libraries (C++, GCC, Make, and Linux).
- Developed a Python application to automate business data processing with 12 large features. It reads input Excel spreadsheets, processes and merges their data into output spreadsheets, and generates PDF bulletins.
- Developed a Python application using Pandas to process Excel spreadsheets and JSON files for inventory processing, generating metrics, summaries, and product and item lists.
- Developed a Python application (Tkinter UI) using Pandas to generate client invoices from Excel files. Developed a Python application (Tkinter UI) using openpyxl to extract data from Excel files and submit them to an invoicing site using Selenium.
- Worked on code maintenance for a system to track workers' hours and activities on computers. Skills: C++, Qt, Makefile, QMake, Linux, MacOS, Windows, Win32.
- Developed an AppSheet and Google Sheets application to receive numbers from a company's IT base, calculate metrics, and return an evaluation for improvements and investments. Developed an AppSheet application to manage medical patient records.
- Developed Excel programs in VBA for clients to automate daily business tasks.
Technologies: Debugging, Design Patterns, Data Structures, Algorithms, Microsoft Unit Tests, C++17, C++11, C++14, Multithreading, SQL, TCP/IP, Makefile, Make (formerly Integromat), Clang, GCC, GNU Debugger (GDB), Visual Studio, Windows, Linux, C++, Python, Python 3, Python API, ETL, Transmission Control Protocol (TCP), UDP, Linux Server Processes, Linux Servers, ASCII, UTF-8, Mathematics, Object-oriented Programming (OOP), Data Scraping, Debian Linux, Regular Expressions, ANSI SQL, Windows API, Microsoft Excel, Spreadsheets, Reports, Architecture, Software Architecture, CSV, CSS, XLSX File Processing, CSV File Processing, Google Sheets, Google AppSheet, Integrated Development Environments (IDE), Software Design Patterns, Best Practices, Optimization, Bazel, Pandas, Tkinter, Tk, Data Transformation, Writing & Editing, Software Development, Technical Writing, Content Writing, C++98, Conan, Refactoring, Databases, Bash, Desktop, GitHub, Distributed Systems, Concurrent Programming, Computer Networking, Software Engineering, Protobuf, Win32 API, Excel VBA, Code Review, Automation, Finance, Accounting, DLL, Git, Back-end, PDF, Microsoft Power Apps, Microsoft Power Platform, Selenium, Excel Macros, Reporting, Document Parsing, Microsoft Word, Airtable, Visual Basic for Applications (VBA), PyInstaller, REST APIs, Pytest, System Architecture, Low Code, Minimum Viable Product (MVP), Scripting, Low-code Development, No-code Development, Automated Testing, C, Qt, Excel 365, Excel Add-ins, Troubleshooting & Issue Resolution, GIS, NumPy
Senior Software Engineer and Architect (C++/Python)
2016 - 2019
GFI/Aurea
- Designed and coded features and fixed issues in the product for various projects for network security software that monitors traffic and categorizes domains to prevent malware installations and non-productive web surfing during work hours.
- Worked on a product used by telecoms to optimize communication between the ISP and the customers. The project involved kernel code, TCP/IP network stack, C, C++, Linux, and low-level debugging (using GDB, Wireshark).
- Led and trained a C++ test team, reviewed their C++ code, and taught classes on testing and unit testing.
- Wrote several integration test suites and unit test suites for three different products.
- Wrote and delivered the test framework for one of the products. These projects involved Visual Studio, GCC, Make, CppUnit, Google Test, and Google Mock.
- Maintained the QT and C++ code of a sales and items configuration system.
- Proposed and coded the improvements and fixed bugs in the software using QT, C++, and Python.
- Improved the build time by parallelizing the build process.
- Wrote PowerShell scripts to automate some tasks in software development and test.
Technologies: Debugging, Design Patterns, Networking, Data Structures, Algorithms, C++17, C++14, C++11, Multithreading, Google, Ant Design, Make (formerly Integromat), GCC, Visual Studio, Processing & Threading, CODE, Kernel, Linux, Win32, Sockets, TCP/IP, Standard Template Library (STL), C++, Python, Python API, Python 3, Google Test, Unit Testing, MySQL, Linux Server Processes, Linux Servers, Security, Monitoring, ASCII, UTF-8, Object-oriented Programming (OOP), CMake, Debian Linux, Regular Expressions, Telnet Protocol, ANSI SQL, Windows API, Microsoft Excel, Spreadsheets, Reports, Architecture, Software Architecture, CSV, Device Drivers, CSV File Processing, Google Sheets, Integrated Development Environments (IDE), Best Practices, Linux Kernel Drivers, Linux Kernel Programming, Linux Kernel, Writing & Editing, Software Development, Technical Writing, Content Writing, C++Builder, C++98, Conan, Refactoring, Databases, Bash, cURL Command Line Tool, Desktop, GitHub, Distributed Systems, Concurrent Programming, Computer Networking, Software Engineering, Protobuf, Win32 API, Windows App Development, Windows Desktop, Code Review, DLL, Git, Back-end, Excel Macros, Reporting, Document Parsing, Microsoft Word, Scripting, Excel 2016, Automated Testing, CI/CD Pipelines, C, Qt, Excel 365, Excel Add-ins, Troubleshooting & Issue Resolution
Technology Lead
2014 - 2015
Infosys
- Developed a distributed system for quality control in Apple factories. The system runs on Mac OS X and is written in Objective-C. The project was developed in three countries and all documentation and communication were done in English.
- Mentored others on the team as I was one of the most experienced members.
- Proposed several of the features of the system and also coded them.
- Conducted technical interviews for recruiting and selected new members for the team.
Technologies: Algorithms, Background Threading, JSON, XML, Sockets, TCP/IP, OCMock, MacOS, Xcode, Objective-C, Standard Template Library (STL), C++, Linux Server Processes, Linux Servers, ASCII, UTF-8, Object-oriented Programming (OOP), Integrated Development Environments (IDE), Software Design Patterns, Best Practices, Writing & Editing, Software Development, Technical Writing, Content Writing, Software Engineering, Microsoft Word, Excel 2016, Troubleshooting & Issue Resolution
Senior Software Developer
2013 - 2014
Tech Soft 3D
- Built a C++ library to convert SketchUp files to the company's 3D graphics framework, which supports several platforms (iOS, Android, Linux, and Windows). My new version was much faster than the previous one (for some files over five times faster).
- Found a number of bugs with the API of the 3D design program (during the coding work) and helped the partner company to diagnose and reproduce them.
- Wrote unit tests for other parts of the framework and expanded some of the functionality.
Technologies: Debugging, Design Patterns, Data Structures, Algorithms, GNU Debugger (GDB), GCC, Make (formerly Integromat), Visual Studio, Linux, Standard Template Library (STL), C++, Linux Server Processes, Linux Servers, ASCII, Mathematics, Object-oriented Programming (OOP), Integrated Development Environments (IDE), Software Design Patterns, Best Practices, Optimization, Software Development, C++98, Refactoring, Software Engineering, Git, Microsoft Word
Senior Software Developer
2012 - 2013
Riverbed
- Developed a C++ module for Steelhead to optimize Exchange server and Outlook connections, improving DCE/RPC and MAPI protocols—one of the product's most popular features.
- Organized and hosted a recurrent series of talks about C++, OO design, and best practices. The series has been well received by the company’s developers and has helped to divulge new ideas and technologies.
- Fixed bugs and wrote documentation to assist the program management and QA teams.
Technologies: Debugging, Data Structures, Design Patterns, Networking, Algorithms, Multithreading, Microsoft SQL Server, Boost, GNU Debugger (GDB), GCC, Make (formerly Integromat), MAPI, RPC, TCP/IP, Background Threading, Linux, Standard Template Library (STL), C++, Linux Server Processes, Linux Servers, Security, ASCII, Object-oriented Programming (OOP), Architecture, Software Architecture, Microsoft Access, Integrated Development Environments (IDE), Software Design Patterns, Best Practices, Optimization, Writing & Editing, Software Development, Technical Writing, Content Writing, C++98, Refactoring, Bash, Computer Networking, Software Engineering, Microsoft Word, Troubleshooting & Issue Resolution
Senior Software Developer
2011 - 2012
Vidder
- Contributed to developing a security suite that used encryption, access control, and security features.
- Worked in a team of two developers who wrote the Linux kernel module for IPv6 NAT, explicitly developing the subsystem that checked server availability.
- Wrote some tools used for diagnosing and providing system information to the administrator.
- Fixed several bugs and refactored parts of the system.
- Interviewed several candidates for the QA and development teams.
- Helped create the tests and questions to evaluate the candidates.
- Taught classes that involved test-driven development and unit tests and introduced the junior members to best practices in C++ and object-oriented design.
Technologies: Debugging, Design Patterns, Data Structures, Networking, Algorithms, Agile, Scrum, Boost, Make (formerly Integromat), TCP/IP, Development, Background Threading, GNU Debugger (GDB), GCC, Visual Studio, Linux, Windows, Standard Template Library (STL), C++, Transmission Control Protocol (TCP), UDP, Cryptography, Linux Server Processes, Linux Servers, Security, ASCII, Object-oriented Programming (OOP), Linux Kernel, Kernel Programming, Linux Kernel Modules, Device Drivers, Integrated Development Environments (IDE), Software Design Patterns, Best Practices, Optimization, Linux Kernel Drivers, Linux Kernel Programming, Writing & Editing, Software Development, Technical Writing, Content Writing, Refactoring, Bash, Computer Networking, Software Engineering, Code Review, DLL, Microsoft Word, C, Troubleshooting & Issue Resolution
Software Developer
2010 - 2010
Microsoft
- Participated in the AppV team— application virtualization and streaming solution—specifically on the streaming component and transport modules. Participated in the requirements analysis, design, and code reviews.
- Wrote documents and designed specifications for AppV.
- Wrote AppV code in C++ using COM, Windows APIs, and Visual Studio, creating dozens of tests for the code and fixing bugs.
Technologies: Data Structures, Debugging, Design Patterns, Networking, UML, HTTP, Background Threading, Processing & Threading, Visual Studio, COM, Windows, Standard Template Library (STL), C++, Unit Testing, Test-driven Development (TDD), ASCII, UTF-8, Object-oriented Programming (OOP), Regular Expressions, Windows API, Device Drivers, Microsoft Access, Integrated Development Environments (IDE), Software Design Patterns, Best Practices, Optimization, Software Development, C++98, Refactoring, Computer Networking, Software Engineering, Win32 API, Windows App Development, Windows Desktop, Code Review, DLL, Microsoft Word
Senior Software Developer
2007 - 2010
SVAM
- Worked on the architecture, coding, and tests for a low-latency financial data feed application for algorithmic trading. Skills used were C++, Win32, Boost, TCP/IP, FTP, HTTP, and threads.
- Ported libraries from Java to C++ for Windows and Linux, resulting in about 10,000 lines of C++ code. The libraries used threads, TCP/IP sockets, and serialization.
- Optimized the libraries for performance and reorganized the API for simplicity.
- Redesigned the built environment from a collection of dozens of Makefiles to a single Makefile. The result was simpler, and build times were reduced by 35%.
- Designed and wrote the specifications and diagrams, and coded an application to control a print quality system based on a camera system. The application runs on Unix. Skills: C, threads (Pthreads), TCP/IP, and telnet protocol.
- Redesigned several parts of a monitoring system used to supervise and generate reports for Kodak industrial printers. The system ran on Unix and communicated with the equipment using SNMP. Skills used were C, threads (Pthreads), and TCP/IP sockets.
- Designed a tool in C++ to collect performance statistics from machines running Unix (AIX and Solaris) and display reports. It was used by managers to assess the capacity of numerous servers.
- Wrote an application in C++ and JavaScript to centralize all server reports so users could use only one UI to see all information.
- Upgraded an application used for a mailing system so it would comply with USPS guidelines. This software controlled the entire conveyor line system on the factory floor. Skills used were C++, Unix, threads (Pthread), and TCP/IP sockets.
Technologies: Debugging, Design Patterns, Networking, Data Structures, Algorithms, Parallel Programming, Multithreading, Low Latency, Qt Creator, Pthreads, Subversion (SVN), GNU Debugger (GDB), GCC, Valgrind, Sockets, TCP/IP, Make (formerly Integromat), Shell Scripting, Shell, Linux, Solaris, AIX, Unix, Standard Template Library (STL), C, C++, Linux Server Processes, Linux Servers, Monitoring, ASCII, UTF-8, Algorithmic Trading, High-frequency Trading (HFT), Fintech, Trading Systems, Object-oriented Programming (OOP), Regular Expressions, Telnet Protocol, ANSI SQL, Windows API, Microsoft Excel, Spreadsheets, Reports, Architecture, Software Architecture, Integrated Development Environments (IDE), Software Design Patterns, Best Practices, Optimization, Writing & Editing, Software Development, Technical Writing, Content Writing, C++98, Refactoring, Databases, Bash, Desktop, Distributed Systems, Concurrent Programming, Computer Networking, Software Engineering, Win32 API, Windows App Development, Windows Desktop, Automation, Finance, DLL, Windows UI, Git, Back-end, Excel Macros, Reporting, Microsoft Word, Excel 2007, Excel Add-ins, Troubleshooting & Issue Resolution
Production Analyst
2005 - 2006
Procwork
- Provided systems support and maintenance to Sprint and Nextel for front-end applications responsible for sales, cancellations, plans modifications, and other operations.
- Analyzed and provided solutions to problems in production.
- Supported the helpdesk, which handled most of the simple support issues, by having my team responsible for investigating matters that affected the entire company.
- Analyzed Java code, shell scripts, database code, Oracle data tables, and OS logs.
- Wrote SQL programs to assist investigations and shell scripts to automate tasks. The entire team used these programs.
Technologies: Solaris, Unix, Shell Scripting, Shell, XML, SQL, Oracle, Java, ASCII, Telnet Protocol, ANSI SQL, Microsoft Excel, Spreadsheets, Reports, Writing & Editing, Technical Writing, Content Writing, Databases, Bash, cURL Command Line Tool, Software Engineering, Excel Macros, Microsoft Word, Excel 2007, Excel Add-ins, Troubleshooting & Issue Resolution
Software Developer (Contract)
2002 - 2005
Freelance Work
- Worked on the design of a system that manages service calls, customer requests, distribution of tasks to field workers, and other features.
- Wrote the specifications and documents for features and tests, conducted interviews with the users, and collected the business requirements.
- Developed the software management and security system for the Brazilian Supreme Electoral Court. It was written for Windows in C++ and consisted of device drivers, services, and applications.
- Wrote a system to monitor file operations in client workstations and report them to a server. The system was written in C++ using Win32 and TCP/IP Sockets and was implemented as a Windows service on the clients and an application on the server.
- Built an application in Visual C++ and MFC to verify the digital signatures of programs.
- Redesigned one of the main units of a system that enabled customers to be able to access their bank accounts at Brazilian Postal Service offices, increasing the performance. The system was written for AIX in C and C++ using Oasis IST and Oracle.
Technologies: AIX, Unix, GCC, IBM Rational ClearCase, Sockets, Transmission Control Protocol (TCP), Microsoft Foundation Classes (MFC), Microsoft Foundation Class (MFC) Library, Win32, Microsoft Visual C++, C, C++, Monitoring, ASCII, Oracle PL/SQL, Object-oriented Programming (OOP), SQL, Desktop App Development, Qt, Graphical User Interface (GUI), User Interface (UI), Kernel Programming, Kernel, Regular Expressions, Telnet Protocol, ANSI SQL, Windows API, Microsoft Excel, Spreadsheets, Reports, Architecture, Software Architecture, Microsoft Access, Outlook, Windows XP, Software Design Patterns, Optimization, Software Development, Technical Writing, Content Writing, Writing & Editing, C++Builder, C++98, Refactoring, Databases, Bash, Desktop, Distributed Systems, Concurrent Programming, Abstract Syntax Trees (AST), Computer Networking, Software Engineering, Win32 API, Windows App Development, Windows Desktop, DLL, Windows UI, Back-end, Excel Macros, Microsoft Word, Compiler Design, System Architecture, Graph Theory, Domain-specific Languages (DSLs), Minimum Viable Product (MVP), Windows Kernel Drivers, Windows Drivers, Excel 2007, Excel Add-ins, Troubleshooting & Issue Resolution
Software Developer
2001 - 2002
StarDigital
- Delivered an application for tax planning for a beverage company. The application was written in Visual Basic as requested by the client.
- Implemented clients' websites in HTML and JavaScript. The sites displayed information contents and enabled business to be conducted.
Technologies: JavaScript, HTML, Win32, Windows CE, Windows, Microsoft Visual C++, C, C++, ASCII, Desktop App Development, Graphical User Interface (GUI), User Interface (UI), Windows API, Windows XP, Software Engineering, Win32 API, Windows App Development, Windows Desktop, Microsoft Word, Troubleshooting & Issue Resolution
Software Developer
1999 - 2001
Potencia Informatica
- Worked as the main developer in the build of an application in C++ and Win32; the client-server communication used RAS and Sockets.
- Collected and analyzed business requirements.
- Authored the specifications and documentation.
- Wrote about 50,000 lines of code.
Technologies: Win32, Sockets, Transmission Control Protocol (TCP), Windows CE, Windows, Microsoft Visual C++, C, C++, ASCII, Desktop App Development, Graphical User Interface (GUI), User Interface (UI), Windows API, Architecture, Software Architecture, Windows XP, TAPI, Software Development, Desktop, Computer Networking, Software Engineering, Win32 API, Windows App Development, Windows Desktop, DLL, Windows UI, Microsoft Word, System Architecture
Experience
Maxxon Mobile Sales (via Potencia Informatica)
I developed the entire sales application for mobile devices.
Technologies: C++, C, Visual C++, Windows NT, Windows CE, RAS, TCP/IP Sockets, Win32
Technologies: C++, C, Visual C++, Windows NT, Windows CE, RAS, TCP/IP Sockets, Win32
Education
1992 - 1995
Bachelor of Science (BSc) Degree in Computer Science
Federal University of Goias - Goiania, GO, Brazil
Skills
Libraries/APIs
Linux API, Pthreads, Sockets, Windows API, Protobuf, Win32 API, POCO, POCO C++, Microsoft Foundation Classes (MFC), REST APIs, Standard Template Library (STL), Microsoft Foundation Class (MFC) Library, Python API, TAPI, Pandas, Tk, NumPy
Tools
Microsoft Visual C++, GCC, Microsoft Visual Studio, Makefile, Make (formerly Integromat), Microsoft Excel, Spreadsheets, Microsoft Access, Google Sheets, Microsoft Word, Excel 2016, Excel 2007, Git, GNU Debugger (GDB), Valgrind, CMake, Bazel, C++Builder, cURL Command Line Tool, GitHub, Microsoft Power Apps, Visual Studio, Xcode, Shell, Subversion (SVN), Qt Creator, IBM Rational ClearCase, Microsoft Unit Tests, Wireshark, Conan, PyInstaller, Pytest, GIS
Languages
C++11, Python 3, C++, C, Python, SQL, C++98, Bash, Domain-specific Languages (DSLs), Visual Basic, Objective-C, XML, Java, HTML, JavaScript, UML, C++14, C++17, CSS, Excel VBA, Visual Basic for Applications (VBA)
Frameworks
Google Test, Boost, CODE, Ant Design, Qt, Selenium
Paradigms
Unit Testing, Object-oriented Programming (OOP), Best Practices, Refactoring, Concurrent Programming, Windows App Development, Compiler Design, Automated Testing, Desktop App Development, Automation, Low-code Development, Scrum, Agile, Parallel Programming, Design Patterns, ETL, Test-driven Development (TDD), REST
Platforms
Windows, Win32, Linux, Debian Linux, Windows XP, Google AppSheet, Software Design Patterns, Desktop, Windows Desktop, Kernel, Kernel Programming, Windows UI, Microsoft Power Platform, MacOS, Unix, AIX, Solaris, Windows CE, Oracle
Storage
MySQL, Databases, Oracle PL/SQL, ANSI SQL, JSON, Microsoft SQL Server
Industry Expertise
High-frequency Trading (HFT), Trading Systems, Accounting
Other
Algorithms, Debugging, Documentation, TCP/IP, Linux Server Processes, Linux Servers, ASCII, UTF-8, Regular Expressions, Telnet Protocol, Reports, Architecture, Software Architecture, CSV, CSV File Processing, Integrated Development Environments (IDE), Optimization, Writing & Editing, Software Development, Technical Writing, Content Writing, Distributed Systems, Abstract Syntax Trees (AST), Computer Networking, Software Engineering, Code Review, DLL, Reporting, Document Parsing, System Architecture, Low Code, Minimum Viable Product (MVP), Scripting, Excel 365, Troubleshooting & Issue Resolution, Security, Monitoring, Algorithmic Trading, Fintech, Mathematics, Graphical User Interface (GUI), User Interface (UI), Data Transformation, Finance, Back-end, PDF, Excel Macros, Airtable, Graph Theory, No-code Development, CI/CD Pipelines, Excel Add-ins, Processing & Threading, Google, OCMock, Background Threading, RPC, MAPI, Development, Transmission Control Protocol (TCP), HTTP, Clang, Low Latency, Multithreading, Data Structures, Networking, Linux Kernel, Windows Kernel Drivers, COM, Shell Scripting, Vi, UDP, Cryptography, Data Scraping, Linux Kernel Modules, Device Drivers, Outlook, XLSX File Processing, Linux Kernel Drivers, Linux Kernel Programming, Tkinter, Windows Drivers
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