Senior Full Stack Engineer

I work as a Senior Full Stack Engineer delivering production applications with Node.js, Express, TypeScript, PostgreSQL, React, Redux Toolkit, React Query, TypeORM, and Prisma. I took ownership of architecture following the Tech Lead's departure and use Cursor and Claude for implementation, debugging, and code review.

I built payment workflows integrating CRM, Protheus, Sensedia, DocuSign, and Asaas for Pix, boleto, credit card, and checkout payments. I implemented status handling for paid, cancelled, refunded, and chargeback events, prevented duplicate webhooks from crediting wallets twice, and covered payment, webhook, and balance flows with Jest tests.

I developed BullMQ, Redis, and PostgreSQL background jobs for monthly post-paid invoice closure and expired prepaid boleto cancellation. I also built self-service B2B purchasing, financial data hub applications, real-time balance updates with Server-Sent Events and Redis, and supported AWS deployments, CI/CD, logging, and Kubernetes autoscaling across microservice platforms.

I developed a corporate management system from scratch using PHP and Oracle Database for cross-company operational workflows.

I built internal workflow interfaces with JavaScript ES6, HTML, CSS, and Bootstrap, supporting business operations across the system.

I developed payment workflow services using Node.js and TypeScript, including a reusable boleto library and REST APIs.

I also built ERP modules with React, Next.js, and TypeScript that consumed these APIs.

I delivered client software projects from requirements gathering through deployment as a freelance software engineer.

My work included a healthcare frontend built with React and GraphQL, as well as a Flutter MVP featuring interactive mini-games and real-time video calling. I worked directly with clients throughout the delivery process.

I worked on a vehicle inspection SaaS platform, modernizing application screens with JavaScript, jQuery, Bootstrap, Razor, and C#/.NET. These improvements reduced weekly technical support tickets by 85%.

I built a real-time camera monitoring application with React and REST APIs, supporting live views and recorded footage across locations. I also developed a C#, WPF, and SQL Server desktop application for biometric collection in the DETRAN-PA driver's license process, including a facial identity validation flow.

I contributed to ISO 27001 documentation while working in an Agile delivery environment.

Higher education degree in Systems Analysis and Development.