Otávio – React, Typescript, Node.js

It's the e-commerce platform for a global publishing and education company, where customers can buy academic material. The project goal was to migrate its legacy SAP system to a modern, more flexible, and resilient architecture.

• Architected serverless workflows using AWS Lambda & Typescript, cutting operational costs 20%.
• Led decommission of Hybris SAP to modern NodeJS cloud architecture, delivering $40k/month savings.
• Produced technical documentation and API specs, boosting team autonomy and onboarding speed.
• Raised code coverage to 80%+ with robust unit and integration tests.
• Actively participated in design discussions and contributed to technical specifications.
• Investigated and resolved issues in the production environment using AWS CloudWatch and Grafana, maintaining the integrity of the system.

It's a web-based management platform that digitizes child registration, attendance, and other administrative processes for institutions serving vulnerable children, providing managers with data-driven insights for better resource allocation and care.

• Architected and developed the management system from scratch, acting as the sole engineer responsible for the full project lifecycle, from initial concept to deployment.
• Translated stakeholder needs into a product roadmap, conducting interviews and analysis to define a set of actionable, high-value features.
• Engineered a data visualization page with interactive dashboards and dynamic charts, enabling school managers to gain actionable insights into students' data.
• Designed and implemented a CI/CD pipeline with GitHub Actions to automate build, testing, and deployment of Dockerized applications to Azure App Service.

It's a scalable platform that automates the issuance of mandatory fiscal documents for the Brazilian logistics sector.

• Led development squad in architecture, code reviews, and tech selection, improving delivery velocity.
• Built a high-performance front-end in React and Next.js using hooks, memoization, and SWR, enhancing UX responsiveness.
• Engineered Redis caching, reducing DB load and API latency by 90%.
• Created a large-scale Node.js Streams module for XLSX reports — 70% less memory use and faster throughput.
• Developed scalable REST APIs and 3rd-party integrations for expanded platform functionality.
• Built an asynchronous job queue with BullMQ and Bluebird for high-volume background tasks.
• Enhanced long-term system health by implementing Clean Code and SOLID principles, leading to fewer bugs and easier feature development.
• Managed Azure infrastructure (serverless functions, queues, databases), enabling new feature delivery at scale.

It's a shipment tracking and logistics management platform for companies in the road freight sector.

• Engineered the core back end and APIs for the platform using Adonis.js, turning raw data into a single source of truth for the front-end pages.
• Developed automated reporting features by leveraging SQL to enable managers to move from day-to-day operations to strategic analysis.
• Architected and built the full-stack registration system using React, streamlining the onboarding process and ensuring the system was scalable.
• Engineered a suite of external APIs using Serverless functions, which opened the platform to third-party integrations and new business partnerships.