devnelson

Delivering high-scale solutions at Mercado Bitcoin, Latin America's largest cryptocurrency exchange. Involving in a project that not only simplifies access to and management of crypto assets, but also empowers financial market professionals to offer a differentiated and automated service to their clients. • Architecting and developing core Cloud Pro APIs and microservices, simplifying crypto asset management for financial consultants and advisors. • Integrating platforms directly with Mercado Bitcoin's core infrastructure to enable automated portfolio rebalancing and real-time market analysis. • Automating repetitive development tasks and complex test scenario generation by implementing custom AI agents into the engineering workflow. Strengthening platform security and architecture resilience to mitigate risks in a high-throughput, critical financial environment.

Drove the evolution of highly critical backend services focused on corporate power management and legal entity registration, enabling the seamless handling of complex business structures. Key contribution: Improved backend services related to the management of corporate powers, supporting the evolution of a critical domain for handling complex business structures. • Architected and executed legacy migrations to modern, cloud-native microservices architectures, significantly reducing technical debt and improving system maintainability. • Optimized data layer performance and caching by managing multiple databases and implementing Redis solutions within a high-throughput ecosystem. • Enhanced system observability and quality standards by establishing comprehensive unit testing suites and configuring real-time monitoring via DataDog. • Managed CI/CD and deployment workflows leveraging Amazon EKS (Kubernetes) and Azure DevOps to ensure secure and resilient production releases.

Worked on developing systems in the areas of Credit Cards and Payroll Loans, in a high-scale environment with high security requirements. Key contribution: Engineered a high-scale solution for Credit Cards and Payroll Loans that reduced external API call volume by 35% (from 400M to 260M monthly requests), generating approximately BRL 450K in monthly savings. • Honored with an internal company award for outstanding impact on operational efficiency, architecture optimization, and cost reduction. • Designed and scaled secure public APIs aligned with strict financial compliance and robust security practices to support continuous penetration testing. • Architected cloud-native microservices using Google Kubernetes Engine (GKE) and asynchronous messaging with Google Pub/Sub in a high-throughput environment. • Managed diverse data persistence and monitoring layers, leveraging SQL/NoSQL databases (PostgreSQL, MySQL, SQL Server, MongoDB), Redis caching, and observability tools like Dynatrace and Google Cloud Logging.

Drove the development and evolution of strategic banking systems, architecting highly scalable and resilient solutions closely aligned with complex business requirements. • Implemented robust asynchronous communication architectures leveraging RabbitMQ to ensure decoupled microservices and reliable message processing. • Optimized data consistency and persistence across multi-database environments, combining Microsoft SQL Server and MongoDB for high-throughput financial operations. • Championed system reliability and long-term maintainability by designing and enforcing comprehensive unit testing suites.

Worked as a Senior .NET Systems Analyst at Grupo MAG (Mongeral Aegon), providing support and maintenance to the Group Life Insurance system, ensuring its stability and operational continuity. • Ensured high availability and operational continuity for the mission-critical Group Life Insurance system, managing core backend stability and long-term maintenance. • Led advanced troubleshooting and incident resolution, diagnosticating complex bugs and root causes reported by business users to minimize operational downtime. • Executed system modernizations and feature enhancements across diverse architectures, maintaining legacy infrastructure while developing modern web solutions using Web Forms, ASP.NET MVC, and ASP.NET Core. • Optimized data layers and delivery pipelines leveraging SQL Server, Entity Framework, and Azure DevOps to enforce strict version control and reliable production deployments.

Worked on the development and evolution of internal systems in a multi-company environment, focusing on process consolidation, operational efficiency, and cost reduction. Key contributions: Led the legacy migration to .NET Core, centralizing all branch operations into a single, cohesive ERP environment that dramatically improved cross-department efficiency and customer service. • Architected and deployed a proprietary electronic invoicing (NF-e) system, replacing an expensive third-party vendor and significantly driving down operational costs across multiple corporate tax IDs (CNPJs). • Spearheaded the development and maintenance of a highly customized, multi-company ERP system, successfully consolidating disparate corporate workflows into a unified platform. • Designed and evolved internal intranet applications, streamlining operational workflows and increasing overall team productivity. • Engineered a custom Python solution dedicated to processing, parsing, and analyzing complex telecom call billing data to optimize financial tracking.

• Delivered training programs in web development (HTML, CSS, JavaScript, ASP, SQL). • Designed course materials, exercises, and evaluations.