Apr 2024 – Present · 2 yrs 1 mo · São Paulo, SP · Remote

• I actively contribute to the C++ MasterClass community, sharing advanced C++ knowledge and mentoring developers worldwide. Although this is not a full-time role, I’m committed to helping others grow and succeed by providing high-quality content and fostering collaboration within the community.
• Tools & Technologies: C++ 03, C++ 11, C++ 14, C++ 17, C++ 20, C++ 23, Qt, ZeroMQ, CMake, AI Code Tools, SSE, AVX, GitHub copilot, Docker, CPU caching, GPU.

May 2023 – Apr 2024 · 11 mos · São Paulo, São Paulo, Brazil · Hybrid

• Led critical components of NoPing’s next-gen VPN platform, working across C++, Go, and C#. Rewrote the core packet handler (naviwireguardnative) from scratch, enabling stable performance over 3Gbps. Optimized naviserver and naviforwarder to increase bandwidth utilization from 74% to 100%, which allowed a 26% reduction in required servers and corresponding costs. Delivered advanced connection modes for enhanced reliability and fault tolerance.
• Tools & Technologies: C++, Go, C#, Windows, Linux, Boost.Asio, Socket Programming, Performance Tuning, Memory Management, Low-Level Networking APIs, TCP/UDP Communication, Windows Filtering Platform (WFP), Wireshark, Reverse engineering, Windows driver development, WinDbg, Microsoft Visual Studio, JSON, GIT, Gitlab, GitHub, Refactoring for performance and scalability, CPU performance monitoring, VTune, test driven development, TDD, CMake, .NET, process, asynchronous, AI Code Tools, Data Encryption, large-scale distributed systems, network protocols, backend API development, Docker, perf, VTune, valgrind, cachegrind, AI.

Oct 2022 – Mar 2023 · 5 mos · Los Angeles, California, United States · Remote

• At Riot Games, contributed to core components of the SDK used by titles like League of Legends, Valorant, and Legends of Runeterra, impacting over 200M players globally. Led the design and implementation of the Matchmaking Plugin, improving matchmaking by selecting optimal servers based on latency. Also worked on critical systems like Chat Sanitizer and EULA, while creating onboarding documentation to streamline adoption by internal teams and partners, SaaS.

Sep 2019 – Sep 2022 · 3 yrs · Greater São Paulo Area · Hybrid

• At XP Inc., the biggest Trading Enterprise in Brazil, played a key role in developing and optimizing mission-critical systems for market data and exchange connectivity. Led the complete redesign of the Market Data Hub, migrating from Java to modern C++17, slashing latency from 50ms down to single-digit microseconds—enabling faster arbitrage decisions that added hundreds of thousands of dollars in additional monthly profit.
• Maintained and enhanced core components like Feeder, Cache, and Relay, boosting performance, stability, and scalability. Co-created and supported essential projects such as ServiceManager and Gandalf.
• Additionally, was responsible for the successful migration of the FXPricer system from FIX 4.4 to FIX 5 within a critical deadline, securing uninterrupted monthly operations for a multi-billion-dollar trading volume.
• Tools & Technologies: C++ 17, C#, Java, Azure DevOps, Visual Studio, Qt, Ultra Low-Latency, High Frequency Trading, HFT, Market Data, Market Data Hub, Market Data Feeds, Network, TCP, UDP, Socket Programming, ZeroMQ, Performance Tuning, Order Entry, Windows, Linux, RedHat, Low-Latency, Fault Tolerance, Unit Testing, GTest, Google Test, CI, CD, Continuous Integration, Continuous Delivery, Kanban, Scrum, FIX Protocol, SBE, Bloomberg, Direct Exchange Connectivity, backtesting, simulation, market data feeds, CMake, Unit Testing Framework, Google Test, .NET, Analyze, process, asynchronous, event-driven, Client-Server application, Finance, Trading, Strong knowledge of Equity Derivatives, , Docker, profiling tools, perf, VTune, Valgrind, cachegrind, Performance Optimization, debugging tools, GDB, core dumps, OOD/OOP, modern GUI, QT, AI, Strong team player, cache behavior, SIMD, CPU pinning, shared memory, Groovy, rpm, FIX protocol, multicast networking, high-performance message processing, financial markets, electronic trading systems, market data feeds, exchange connectivity, performance profiling, latency optimization, .NET

Jan 2013 – Sep 2019 · 6 yrs 8 mos · São Paulo Area, Brazil · On-site

• At Agit, I was hired into a critical situation where the legacy ERP system—built with Delphi 4, Dbase, and Paradox—had no available source code. I became the sole steward of this mission-critical platform responsible for processing over $10 million in monthly supplier payments, ensuring flawless operation under immense pressure where any delay could trigger multi-million dollar penalties.
• Recognizing the risks, I led the entire development lifecycle of a next-generation ERP, SISCAP, built from scratch using C++, Qt, and PostgreSQL. This advanced system automated complex financial processes, including legal case management, supplier governance, and accounts payable/receivable with seamless bank integrations—delivering precision, compliance, and zero downtime.
• Beyond development, I committed weekends to teaching advanced C++ to professionals from top institutions such as USP, UNICAMP, Petrobras, and Vale, underscoring my dedication to technical excellence and knowledge sharing.
• Tools & Technologies: C++ 11, C++ 14, C++ 17, Windows, Linux, Qt, Qt Creator, JSON, XML, XSL, SQLite, PostgreSQL, Postgres, SQL, CRUD, GUI development, Graphics Design, real-time debugging, GUI Development, Quick learner, problem solver, HTTP, HTTPS, compression, data encryption, custom parser, Client-Server application, PL/SQL, stored procedure scripting, WebAssembly, C++ in a frontend context, browser internals.

Aug 2012 – Jan 2013 · 5 mos · São Paulo Area, Brazil · On-site

• I played a key role in advancing and maintaining a complex hospital management system using Delphi 7, with deep expertise in SQL Server and Oracle 10g databases. One of my most critical achievements was redesigning the hospital supplies module to support partial deliveries for the same order — a vital feature that reflects the unpredictable, fast-paced nature of hospital logistics and prevents costly operational disruptions.
• Additionally, I developed a robust blood bag management module that tracks various blood types and rigorously monitors expiration dates, ensuring the highest standards of safety and compliance in blood supply handling.
• These modules are mission-critical: any errors could directly impact patient safety and hospital efficiency.

Mar 2012 – Aug 2012 · 5 mos · São Roque - SP, Brasil · On-site

• I played a pivotal role in maintaining and enhancing a high-stakes exchange system and its sub-modules, utilizing deep expertise in Delphi (7, 2006, XE2) and Firebird databases. A standout achievement was the development and integration of a sophisticated module interfacing with Receita Federal—the Brazilian federal tax authority—to detect and prevent potential fraud in foreign exchange contracts, significantly strengthening system security and regulatory compliance.
• Furthermore, I led the design and implementation of a cutting-edge productivity tracking system built with C++ Builder and SQL Server. This system provided granular insights into programmer performance by measuring task complexity and tracking completions, delivering precise, data-driven evaluations that empowered management to optimize team efficiency and drive continuous improvement.